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CPC
COOPERATIVE PATENT CLASSIFICATION
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H01Q
AERIALS ( microwave radiators for near-field therepeutic treatment A61N 5/04 ; apparatus for testing aerials or for measuring aerial characteristics G01R; waveguides H01P; radiators or aerials for microwave heating H05B 6/72 )
NOTE
-
This subclass covers:

- in addition to the primary active radiating elements,
a) secondary devices for absorbing or for modifying the
direction or polarisation of waves radiated from aerials,
and
b) combinations with auxiliary devices such as earthing
switches, lead-in devices, and lightning protectors;
- both transmitting and receiving aerials

This subclass does not cover devices of the waveguide type, such as resonators or lines, not designed as radiating elements, which are covered by subclass H01P.

In this subclass, the following expression is used with the meaning indicated:

- "active radiating element" covers corresponding parts of a
receiving aerial.

WARNING
-
The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following CPC groups : - H01Q 5/01 covered by H01Q 5/0003 to H01Q 5/0096 - H01Q 5/02 covered by H01Q 5/0003 to H01Q 5/0096 ]

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H01Q 1/00
Details of, or arrangements associated with, aerials ( arrangements for varying orientation of directional pattern H01Q 3/00 )
NOTE
-
This group covers only:

- structural details or features of aerials not dependent on
electric operation;
- structural details or features applicable to more than one
type of aerial or aerial element.

Structural details or features described with reference to, or clearly applicable only to, aerials or aerial elements of a particular type are classified in the group appropriate to that type.

H01Q 1/002
.
{
Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an aerial ( cooling H01Q 1/02 )
}
H01Q 1/005
.
{
Damping of vibrations; Means for reducing wind-induced forces ( damping of vibrations in general F16F )
}
H01Q 1/007
.
{
specially adapted for indoor communication
}
H01Q 1/02
.
Arrangements for de-icing ; Arrangements for drying-out;
{
Arrangements for cooling; Arrangements for preventing corrosion ( radomes H01Q 1/42 )
}
H01Q 1/04
.
Adaptation for subterranean or subaqueous use
H01Q 1/06
.
Means for the lighting or illuminating of aerials, e.g. for purpose of warning
Collapse
H01Q 1/08
.
Means for collapsing aerials or parts thereof;
{
Collapsible aerials
}
 (
{
collapsible supports H01Q 1/1235
}
 ; collapsible loop aerials H01Q 7/02 ;
{
collapsible helical aerials H01Q 11/086 ; collapsible reflecting surfaces H01Q 15/161 , H01Q 15/20
}
 ; collapsible H-aerials or Yagi aerials H01Q 19/04 )
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H01Q 1/081
. .
{
Inflatable antennas
}
H01Q 1/082
. . .
{
Balloon antennas ( balloon supported antennas H01Q 1/1292 )
}
H01Q 1/084
. .
{
Pivotable antennas ( mechanical movement of aerial or aerial system for changing or varying the orientation or the shape of the directional pattern H01Q 3/02 ; adjustment of angle between two radiating elements H01Q 9/12 )
}
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H01Q 1/085
. .
{
Flexible aerials; Whip aerials with a resilient base
}
H01Q 1/087
. . .
{
Extensible roll- up aerials
}
H01Q 1/088
. .
{
Quick-releasable antenna elements
}
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H01Q 1/10
. .
Telescopic elements
H01Q 1/103
. . .
{
Latching means; ensuring extension or retraction thereof
}
H01Q 1/106
. . .
{
Means for locking or protecting against unauthorized extraction
}
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H01Q 1/12
.
Supports ; Mounting means (
{
for the purpose of scanning H01Q 3/00 ; mounting structure for reflecting surfaces H01Q 15/14 ; Towers, masts, or poles E04H 12/00
}
 ; supporting conductors in general H02G 7/00 )
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H01Q 1/1207
. .
{
for fastening a rigid aerial element
}
H01Q 1/1214
. . .
{
through a wall
}
H01Q 1/1221
. . .
{
onto a wall
}
H01Q 1/1228
. . .
{
on a boom ( coupling of tubular pipes F16B 7/04 )
}
H01Q 1/1235
. .
{
Collapsible supports; Means for erecting a rigid antenna
}
H01Q 1/1242
. .
{
Rigid masts specially adapted for supporting an aerial
}
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H01Q 1/125
. .
{
Means for positioning ( stabilising H01Q 1/18 ; remotely controlled positioning H01Q 3/005 )
}
H01Q 1/1257
. . .
{
using the received signal strength ( direction finding G01S 3/38 ; diversity H04B 7/10 )
}
H01Q 1/1264
. . .
{
Adjusting different parts or elements of an aerial unit
}
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H01Q 1/1271
. .
{
for mounting on windscreens
}
H01Q 1/1278
. . .
{
in association with heating wires or layers
}
H01Q 1/1285
. . .
{
with capacitive feeding through the windscreen
}
H01Q 1/1292
. .
{
for mounting on balloons
}
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H01Q 1/14
. .
for wire or other non-rigid radiating elements
H01Q 1/16
. . .
Strainers, spreaders, or spacers
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H01Q 1/18
. .
Means for stabilising aerials on an unstable platform
{
( reducing wind-induced forces H01Q 1/005 )
}
H01Q 1/185
. . .
{
by electronic means ( electronic scanning H01Q 3/26 )
}
H01Q 1/20
. .
Resilient mountings
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H01Q 1/22
. .
by structural association with other equipment or articles
{
( portable transceivers H04B 1/3827 )
}
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H01Q 1/2208
. . .
{
associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification (RFID) systems ( G06K 7/00 and G06K 19/00 take precedence )
}
H01Q 1/2216
. . . .
{
used in interrogator/reader equipment
}
H01Q 1/2225
. . . .
{
used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
}
H01Q 1/2233
. . . .
{
used in consumption-meter devices, e.g. electricity, gas or water meters ( remote reading of utility meters G01D 4/002 ; transmission of measured values using a radio link in general G08C 17/02 )
}
H01Q 1/2241
. . . .
{
used in or for vehicle tyres ( tyres in general B60C 3/04 )
}
H01Q 1/225
. . .
{
used in level-measurement devices, e.g. for level gauge measurement ( level measuring with electromagnetic waves in general G01F 23/284 )
}
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H01Q 1/2258
. . .
{
used with computer equipment
}
H01Q 1/2266
. . . .
{
disposed inside the computer
}
H01Q 1/2275
. . . .
{
associated to expansion card or bus, e.g. in PCMCIA, PC cards, Wireless USB
}
H01Q 1/2283
. . .
{
mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package ( chip carriers for flat cards H01L 23/49855 )
}
H01Q 1/2291
. . .
{
used in bluetooth or WI-FI devices of Wireless Local Area Networks (WLAN) ( H01Q 1/241 takes precedence; WLAN in general H04L12/28W )
}
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H01Q 1/24
. . .
with receiving set
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H01Q 1/241
. . . .
{
used in mobile communications, e.g. GSM ( H01Q 1/247 , H01Q 1/248 take precedence )
}
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H01Q 1/242
. . . . .
{
specially adapted for hand-held use
}
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H01Q 1/243
. . . . . .
{
with built-in antennas
}
H01Q 1/244
. . . . . . .
{
extendable from a housing along a given path
}
H01Q 1/245
. . . . . .
{
with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
}
H01Q 1/246
. . . . .
{
specially adapted for base stations
}
H01Q 1/247
. . . .
{
with frequency mixer, e.g. for direct satellite reception or Doppler radar ( active antennas H01Q 23/00 )
}
H01Q 1/248
. . . .
{
provided with an AC/DC converting device, e.g. rectennas
}
H01Q 1/26
. . .
with electric discharge tube
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H01Q 1/27
.
Adaptation for use in or on movable bodies ( H01Q 1/08 , H01Q 1/12 , H01Q 1/18 take precedence;
{
portable transceivers H04B 1/3827
}
 )
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H01Q 1/273
. .
{
Adaptation for carrying or wearing by persons or animals
}
H01Q 1/276
. . .
{
for mounting on helmets
}
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H01Q 1/28
. .
Adaptation for use in or on aircraft, missiles, satellites, or balloons
H01Q 1/281
. . .
{
Nose antennas
}
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H01Q 1/282
. . .
{
Modifying the aerodynamic properties of the vehicle, e.g. projecting type aerials
}
H01Q 1/283
. . . .
{
Blade, stub antennas
}
H01Q 1/285
. . .
{
Aircraft wire antennas ( means for trailing H01Q 1/30 )
}
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H01Q 1/286
. . .
{
substantially flush mounted with the skin of the craft
}
H01Q 1/287
. . . .
{
integrated in a wing or a stabiliser
}
H01Q 1/288
. . .
{
Satellite antennas
}
H01Q 1/30
. . .
Means for trailing aerials
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H01Q 1/32
. .
Adaptation for use in or on road or rail vehicles ( telescopic elements H01Q 1/10 ; resilient mountings for aerials H01Q 1/20 )
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H01Q 1/3208
. . .
{
characterised by the application wherein the antenna is used
}
H01Q 1/3216
. . . .
{
where the road or rail vehicle is only used as transportation means
}
H01Q 1/3225
. . . .
{
Cooperation with the rails or the road
}
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H01Q 1/3233
. . . .
{
particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
}
H01Q 1/3241
. . . . .
{
particular used in keyless entry systems
}
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H01Q 1/325
. . .
{
characterised by the location of the antenna on the vehicle
}
H01Q 1/3258
. . . .
{
using the gutter of the vehicle; Means for clamping a whip aerial on the edge of a part of the vehicle
}
H01Q 1/3266
. . . .
{
using the mirror of the vehicle
}
H01Q 1/3275
. . . .
{
mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
}
H01Q 1/3283
. . . .
{
side-mounted antennas, e.g. bumper-mounted, door-mounted ( mounted on windscreens H01Q 1/1271 )
}
H01Q 1/3291
. . . .
{
mounted in or on other locations inside the vehicle or vehicle body
}
H01Q 1/34
. .
Adaptation for use in or on ships, submarines, buoys, or torpedoes ( for subaqueous use H01Q 1/04 ; retractable loop aerials H01Q 7/02 )
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H01Q 1/36
.
Structural form of radiating elements, e.g. cone, spiral, umbrella;
{
Particular materials used therewith
}
 ( H01Q 1/08 , H01Q 1/14 take precedence )
H01Q 1/362
. .
{
for broadside radiating helical antennas
}
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H01Q 1/364
. .
{
using a particular conducting material, e.g. supraconductor
}
H01Q 1/366
. . .
{
using an ionized gas
}
H01Q 1/368
. . .
{
using carbon or carbon composite
}
H01Q 1/38
. .
formed by a conductive layer on an insulating support (
{
patch antennas H01Q 9/0407 ; microstrip dipole antennas H01Q 9/065 ; microstrip slot antenn as H01Q 13/106 ; transmission line microstrip antennas H01Q 13/206 ; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q 15/142
}
 ; conductors in general H01B 5/14 )
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H01Q 1/40
.
Radiating elements coated with or embedded in protective material
H01Q 1/405
. .
{
Radome integrated radiating elements
}
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H01Q 1/42
.
Housings not intimately mechanically associated with radiating elements, e.g. radome
H01Q 1/421
. .
{
Means for correcting aberrations introduced by a radome
}
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H01Q 1/422
. .
{
comprising two or more layers of dielectric material ( H01Q 1/425 takes precedence )
}
H01Q 1/424
. . .
{
comprising a layer of expanded material
}
H01Q 1/425
. .
{
comprising a metallic grid
}
H01Q 1/427
. .
{
Flexible radomes
}
H01Q 1/428
. .
{
Collapsible radomes; rotatable, tiltable radomes
}
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H01Q 1/44
.
using equipment having another main function to serve additionally as an aerial;
{
Means for giving an aerial anaesthetic aspect
}
 ( H01Q 1/28 to H01Q 1/34 take precedence )
H01Q 1/46
. .
Electric supply lines or communication lines
{
( circuits for signal transmission via power distribution lines H04B 3/56 )
}
H01Q 1/48
.
Earthing means ; Earth screens ; Counterpoises ( earthing pins H01R 4/66 )
H01Q 1/50
.
Structural association of aerials with earthing switches, lead-in devices or lightning protectors ( lead-in devices H01B ; lightning protectors, switches H01H )
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H01Q 1/52
.
Means for reducing coupling between aerials ; Means for reducing coupling between an aerial and another structure
{
( absorbing means H01Q 17/00 )
}
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H01Q 1/521
. .
{
reducing the coupling between adjacent antennas
}
H01Q 1/523
. . .
{
between antennas of an array
}
H01Q 1/525
. . .
{
between emitting and receiving antennas ( feed-through nulling for radar G01S 7/038 )
}
H01Q 1/526
. .
{
Electromagnetic shields ( anechoic chambers G01R 29/105 ; shielding of instruments G12B 17/00 , of CRT H01J 29/867 , of electrical apparatus or components H05K 9/00 )
}
H01Q 1/528
. .
{
reducing the reradiation of a support structure ( in a parabolic reflector antenna H01Q 19/023 )
}
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H01Q 3/00
Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an aerial or aerial system
{
( means for positioning H01Q 1/125 )
}
H01Q 3/005
.
{
using remotely controlled aerial positioning or scanning ( remote control in general G08C )
}
H01Q 3/01
.
varying the shape of the aerial or aerial system
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H01Q 3/02
.
using mechanical movement of aerial or aerial system as a whole
Collapse
H01Q 3/04
. .
for varying one co-ordinate of the orientation
H01Q 3/06
. . .
over a restricted angle
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H01Q 3/08
. .
for varying two co-ordinates of the orientation
H01Q 3/10
. . .
to produce a conical or spiral scan
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H01Q 3/12
.
using mechanical relative movement between primary active elements and secondary devices of aerials or aerial systems
{
( positioning H01Q 1/1264 )
}
H01Q 3/14
. .
for varying the relative position of primary active element and a refracting or diffracting device
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H01Q 3/16
. .
for varying relative position of primary active element and a reflecting device
H01Q 3/18
. . .
wherein the primary active element is movable and the reflecting device is fixed
H01Q 3/20
. . .
wherein the primary active element is fixed and the reflecting device is movable
H01Q 3/22
.
varying the orientation in accordance with variation of frequency of radiated wave
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H01Q 3/24
.
varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
H01Q 3/242
. .
{
Circumferential scanning
}
H01Q 3/245
. .
{
in the focal plane of a focussing device
}
H01Q 3/247
. .
{
by switching different parts of a primary active element
}
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H01Q 3/26
.
varying the relative phase or relative amplitude of energisation between two or more active radiating elements ; varying the distribution of energy across a radiating aperture (
{
H01Q 3/12
}
 , H01Q 3/22 , H01Q 3/24 take precedence;
{
use of steered beams for mobile service area coverage H04Q 7/3615
}
 )
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H01Q 3/2605
. .
{
Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays ( tracking G01S 3/42 )
}
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H01Q 3/2611
. . .
{
Means for null steering; Adaptive interference nulling
}
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H01Q 3/2617
. . . .
{
Array of identical elements
}
H01Q 3/2623
. . . . .
{
composed of two antennas
}
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H01Q 3/2629
. . . .
{
Combination of a main antenna unit with an auxiliary antenna unit
}
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H01Q 3/2635
. . . . .
{
the auxiliary unit being composed of a plurality of antennas
}
H01Q 3/2641
. . . . . .
{
being secundary elements, e.g. reactively steered
}
H01Q 3/2647
. . .
{
Retrodirective arrays
}
H01Q 3/2652
. . .
{
Self-phasing arrays
}
H01Q 3/2658
. .
{
Phased-array fed focussing structure
}
H01Q 3/2664
. .
{
electrically moving the phase centre of a radiating element in the focal plane of a focussing device ( switching H01Q 3/245 , phased-array feeds H01Q 3/2658 )
}
H01Q 3/267
. .
{
Phased-array testing or checking devices ( measuring radiation diagrams of aerials G01R 29/10 )
}
H01Q 3/2676
. .
{
Optically controlled phased array ( optical fibre networks H03H 2/003 )
}
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H01Q 3/2682
. .
{
Time delay steered arrays
}
H01Q 3/2688
. . .
{
using acoustic or magnetostatic wave devices
}
H01Q 3/2694
. . .
{
using also variable phase-shifters ( H01Q 3/2688 takes precedence )
}
H01Q 3/28
. .
varying the amplitude
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H01Q 3/30
. .
varying the
{
relative
}
 phase
{
between the radiating elements of an array ( H01Q 3/2605 , H01Q 3/2658 , H01Q 3/2682 , H01Q 3/44 take precedence )
}
H01Q 3/32
. . .
by mechanical means
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H01Q 3/34
. . .
by electrical means ( active lenses or reflecting arrays H01Q 3/46 )
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H01Q 3/36
. . . .
with variable phase-shifters
{
( combined with time delay devices H01Q 3/2682 )
}
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H01Q 3/38
. . . . .
the phase-shifters being digital
H01Q 3/385
. . . . . .
{
Scan control logics
}
H01Q 3/40
. . . .
with phasing matrix
H01Q 3/42
. . . .
using frequency-mixing
{
( H01Q 3/2676 takes precedence )
}
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H01Q 3/44
.
varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
H01Q 3/443
. .
{
varying the phase velocity along a leaky transmission line ( frequency scanning H01Q 3/22 ; non-resonant leaky-waveguide or transmission-line aerials H01Q 13/20 )
}
H01Q 3/446
. .
{
the radiating element being at the centre of one or more rings of auxiliary elements
}
H01Q 3/46
. .
Active lenses or reflecting arrays
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H01Q 5/00
Arrangements for simultaneous operation of aerials on two or more different wavebands,
{
e.g. dual- or multi-band like arrangements for broad wavebands
}
 ( length of elements adjustable H01Q 9/14 ; combinations of separate active aerial units operating in different wavebands and connected to a common feeder system H01Q 21/30 ;
{
non-simultaneous operation of aerials with adjustable lengths or elements H01Q 9/14 ; broad/multi-band operation in general without specific features H01Q 5/00
}
 )
H01Q 5/0003
.
{
Single aerial units operating on two or more wavebands ( H01Q 5/02 takes precedence )
}
WARNING
-
This group is no longer used for the classification of new documents as from September 1, 2011. The back log of this group is being continuously reclassified to subgroups H01Q 5/00 G, H01Q 5/0024 , H01Q 5/0072 and H01Q 5/00 P

H01Q 5/0006
.
{
Imbricated structures ( H01Q 5/02 takes precedence )
}
WARNING
-
This group and subgroups thereof are no longer used for the classification of new documents as from September 1, 2011. The back log of these groups is being continuously reclassified to subgroups H01Q 5/00 G, H01Q 5/0024 , H01Q 5/0072 and H01Q 5/0093

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H01Q 5/001
.
{
Characterized by having two or more different wavebands
}
WARNING
-
Not complete, pending reclassification. See also H01Q 5/0003 and H01Q 5/0006

H01Q 5/0013
. .
{
RF wavebands combined with non-RF wavebands, e.g. infrared or optical
}
H01Q 5/0017
. .
{
Ultra-wide-band or pulse systems, e.g. multiple resonances systems ( H01Q 9/005 takes precedence )
}
H01Q 5/002
. .
{
Achieving other properties, e.g. polarisation or beam width over two or more different wavebands
}
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H01Q 5/0024
.
{
Arrangements or measures for achieving the different wavebands
}
WARNING
-
Not complete, pending reclassification. See also H01Q 5/0003 and H01Q 5/0006

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H01Q 5/0027
. .
{
Single fed radiating element, or connected radiating elements at least one of which is fed
}
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H01Q 5/0031
. . .
{
using frequency dependent circuits, e.g. capacitors, trap circuits
}
H01Q 5/0034
. . . .
{
within a radiating element or between connected radiating elements
}
H01Q 5/0037
. . . .
{
between a radiating element and ground
}
H01Q 5/0041
. . . .
{
at the feed, e.g. for impedance matching
}
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H01Q 5/0044
. . .
{
using different modes ( H01Q 5/0031 takes precedence )
}
H01Q 5/0048
. . . .
{
using two or more simultaneous feed points on a same radiating element or on the connected radiating elements
}
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H01Q 5/0051
. . . .
{
using a single feed point
}
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H01Q 5/0055
. . . . .
{
Creating different current paths, e.g. of the same type
}
H01Q 5/0058
. . . . . .
{
Branching current paths of the same type
}
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H01Q 5/0062
. .
{
Combination of a fed and one or more additional parasitic elements
}
H01Q 5/0065
. . .
{
At least two additional elements
}
H01Q 5/0068
. . .
{
the additional element itself having dual- or multi-band characteristics
}
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H01Q 5/0072
.
{
Imbricated or interleaved structures; Structures otherwise combined or electro-magnetically coupled, e.g. comprising two or more non-connected fed radiating elements ( same feed H01Q 21/30 ; independent non-interacting antennas H01Q 21/28 )
}
WARNING
-
Not complete, pending reclassification. See also H01Q 5/0003 and H01Q 5/0006

H01Q 5/0075
. .
{
using two or more imbricated arrays ( H01Q 5/0089 takes precedence )
}
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H01Q 5/0079
. .
{
using two or more feeds in association with a same reflecting, diffracting or refracting device
}
H01Q 5/0082
. . .
{
with a coaxial arrangement of the feeds
}
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H01Q 5/0086
. .
{
Combinations of dipole type aerials
}
H01Q 5/0089
. . .
{
with parasitic elements not for dual- or multi-band, e.g. imbricated Yagi aerials
}
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H01Q 5/0093
.
{
Arrangement for broad- or multi-band operation concerning feeding or matching ( H01Q9/04K2A6 takes precedence )
}
WARNING
-
Not complete, pending reclassification. See also H01Q 5/0003 and H01Q 5/0006

H01Q 5/0096
. .
{
For horn or waveguide antennas
}
Collapse
H01Q 5/01
.
Resonant aerials
H01Q 5/02
. .
for operation of centre-fed aerials which comprise a single, or two or more collinear, substantially straight elongated active elements
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H01Q 7/00
Loop aerials with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
H01Q 7/005
.
{
with variable reactance for tuning the antenna ( tuning resonant circuits H03J )
}
H01Q 7/02
.
Collapsible aerials ; Retractable aerials
H01Q 7/04
.
Screened aerials ( H01Q 7/02 , H01Q 7/06 take precedence )
Collapse
H01Q 7/06
.
with core of ferromagnetic material ( H01Q 7/02 takes precedence )
H01Q 7/08
. .
Ferrite rod or like elongated core
Collapse
H01Q 9/00
Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements ( loop aerials H01Q 7/00 ; waveguide horns or mouths H01Q 13/00 ; slot aerials H01Q 13/00 ; combinations of active elements with secondary devices to give desired directional characteristic H01Q 19/00 ; combinations of two or more active elements H01Q 21/00 )
H01Q 9/005
.
{
for radiating non-sinusoidal waves
}
H01Q 9/02
.
Non-resonant aerials
Collapse
H01Q 9/04
.
Resonant aerials
Collapse
H01Q 9/0407
. .
{
Substantially flat resonant element parallel to ground plane, e.g. patch antenna ( dipole H01Q 9/285 ; monopole H01Q 9/40 )
}
H01Q 9/0414
. . .
{
in a stacked or folded configuration
}
H01Q 9/0421
. . .
{
with a shorting wall or a shorting pin at one end of the element ( H01Q 9/0414 takes precedence )
}
Collapse
H01Q 9/0428
. . .
{
radiating a circular polarised wave
}
H01Q 9/0435
. . . .
{
using two feed points
}
H01Q 9/0442
. . .
{
with particular tuning means
}
Collapse
H01Q 9/045
. . .
{
with particular feeding means ( for circular polarisation H01Q 9/0428 )
}
H01Q 9/0457
. . . .
{
electromagnetically coupled to the feed line
}
H01Q 9/0464
. . .
{
Annular ring patch
}
H01Q 9/0471
. . .
{
Non-planar, stepped or wedge-shaped patch
}
H01Q 9/0478
. . .
{
with means for suppressing spurious modes, e.g. cross polarisation
}
Collapse
H01Q 9/0485
. .
{
Dielectric resonator antennas
}
H01Q 9/0492
. . .
{
circularly polarised
}
Collapse
H01Q 9/06
. .
Details
H01Q 9/065
. . .
{
Microstrip dipole antennas ( patch antenna H01Q 9/0407 )
}
H01Q 9/08
. . .
Junction boxes specially adapted for supporting adjacent ends of collinear rigid elements
Collapse
H01Q 9/10
. . .
Junction boxes specially adapted for supporting adjacent ends of divergent elements
H01Q 9/12
. . . .
adapted for adjustment of angle between elements
Collapse
H01Q 9/14
. . .
Length of element or elements adjustable ( telescopic elements H01Q 1/10 )
H01Q 9/145
. . . .
{
by varying the electrical length
}
Collapse
H01Q 9/16
. .
with feed intermediate between the extremities of the aerial, e.g. centre-fed dipole ( H01Q 9/44 takes precedence )
H01Q 9/18
. . .
Vertical disposition of the aerial
Collapse
H01Q 9/20
. . .
Two collinear substantially straight active elements ; Substantially straight single active elements ( H01Q 9/28 takes precedence )
H01Q 9/22
. . . .
Rigid rod or equivalent tubular element or elements
H01Q 9/24
. . . .
Shunt feed arrangements to single active elements, e.g. for delta matching
Collapse
H01Q 9/26
. . .
with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength ( resonant loop aerials H01Q 7/00 )
H01Q 9/265
. . . .
{
Open ring dipoles; Circular dipoles
}
H01Q 9/27
. . . .
Spiral aerials
Collapse
H01Q 9/28
. . .
Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface ; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines ( biconical horns H01Q 13/04 )
H01Q 9/285
. . . .
{
Planar dipole ( H01Q 9/065 takes precedence; patch antenna H01Q 9/0407 )
}
Collapse
H01Q 9/30
. .
with feed to end of elongated active element, e.g. unipole ( H01Q 9/44 takes precedence )
Collapse
H01Q 9/32
. . .
Vertical arrangement of element ( H01Q 9/40 takes precedence )
H01Q 9/34
. . . .
Mast, tower, or like self-supporting or stay-supported aerials
H01Q 9/36
. . . .
with top loading
H01Q 9/38
. . . .
with counterpoise ( with counterpoise comprising elongated elements coplanar with the active element H01Q 9/44 )
H01Q 9/40
. . .
Element having extended radiating surface
Collapse
H01Q 9/42
. . .
with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
H01Q 9/43
. . . .
Scimitar aerials
Collapse
H01Q 9/44
. .
with plurality of divergent straight elements, e.g. V-dipole, X-aerial ; with plurality of elements having mutually inclined subtantially straight portions ( turnstile aerials H01Q 21/26 )
H01Q 9/46
. . .
with rigid elements diverging from single point
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H01Q 11/00
Electrically-long aerials having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements ( leaky waveguides aerials, slot aerials H01Q 13/00 ; combinations of active elements with secondary devices to give desired directional characteristic H01Q 19/00 ; aerial arrays or systems H01Q 21/00 )
Collapse
H01Q 11/02
.
Non-resonant aerials, e.g. travelling-wave aerial
H01Q 11/04
. .
with parts bent, folded, shaped, screened, or electrically loaded to obtain desired phase relation of radiation from selected sections of the aerial ( rhombic aerials, V-aerials H01Q 11/06 )
H01Q 11/06
. .
Rhombic aerials ; V-aerials
Collapse
H01Q 11/08
. .
Helical aerials
H01Q 11/083
. . .
{
Tapered helical aerials, e.g. conical spiral aerials
}
H01Q 11/086
. . .
{
collapsible
}
Collapse
H01Q 11/10
. .
Log-periodic aerials
{
periodic aerials, e.g. length or spacing of elements according to a given law
}
 ( H01Q 11/08 takes precedence )
H01Q 11/105
. . .
{
using a dielectric support
}
Collapse
H01Q 11/12
.
Resonant aerials
Collapse
H01Q 11/14
. .
with parts bent, folded, shaped, or screened, or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the aerial or to obtain desired polarisation effects
Collapse
H01Q 11/16
. . .
in which the selected sections are collinear
H01Q 11/18
. . . .
in which the selected sections are parallelly spaced
H01Q 11/20
. .
V-aerials
Collapse
H01Q 13/00
Waveguide horns or mouths ; Slot aerials ; Leaky-waveguide aerials ; Equivalent structures causing radiation along the transmission path of a guided wave
{
multimode aerials H01Q 25/04
}
Collapse
H01Q 13/02
.
Waveguide horns
Collapse
H01Q 13/0208
. .
{
Corrugated horns ( waveguide mouth antenna with corrugated flange H01Q 13/065 ; manufacturing details H01Q 13/0283 )
}
H01Q 13/0216
. . .
{
Dual-depth corrugated horns
}
H01Q 13/0225
. . .
{
of non-circular cross-section ( H01Q 13/0216 takes precedence )
}
H01Q 13/0233
. .
{
Horns fed by a slotted waveguide array ( biconical horns H01Q 13/06 )
}
H01Q 13/0241
. .
{
radiating a circularly polarised wave ( H01Q 13/0258 takes precedence; polarisation converters H01Q 15/244 , in a waveguide H01P 1/17 )
}
Collapse
H01Q 13/025
. .
{
Multimode horn antennas; Horns using higher mode of propagation ( H01Q 13/0241 takes precedence; multiple beam H01Q 25/04 )
}
H01Q 13/0258
. . .
{
Orthomode horns ( Orthomode transducers H01P 1/161 )
}
H01Q 13/0266
. .
{
provided with a flange or a choke
}
H01Q 13/0275
. .
{
Ridged horns ( slot-line radiating ends H01Q 13/085 )
}
Collapse
H01Q 13/0283
. .
{
Apparatus or processes specially provided for manufacturing horns
}
H01Q 13/0291
. . .
{
for corrugated horns
}
H01Q 13/04
. .
Biconical horns ( biconical dipoles comprising two conical surfaces having collinear axes and adjacent apices and fed by a two-conductor transmission line H01Q 9/28 )
Collapse
H01Q 13/06
.
Waveguide mouths ( horns H01Q 13/02 )
H01Q 13/065
. .
{
provided with a flange or a choke
}
Collapse
H01Q 13/08
.
Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
H01Q 13/085
. .
{
Slot-line radiating ends
}
Collapse
H01Q 13/10
.
Resonant slot aerials
H01Q 13/103
. .
{
with variable reactance for tuning the antenna ( tuning resonant circuits H03J )
}
H01Q 13/106
. .
{
Microstrip slot antennas ( patch antenna elements H01Q 9/0407 )
}
Collapse
H01Q 13/12
. .
Longitudinally slotted cylinder aerials ; Equivalent structures
H01Q 13/14
. . .
Skeleton cylinder aerials
H01Q 13/16
. .
Folded slot aerials
H01Q 13/18
. .
the slot being backed by, or formed in boundary wall of, a resonant cavity ( longitudinally slotted cylinder H01Q 13/12 ) ;
{
Open cavity antennas
}
Collapse
H01Q 13/20
.
Non-resonant leaky-waveguide or transmission-line aerials ; Equivalent structures causing radiation along the transmission path of a guided wave
{
varying the phase velocity H01Q 3/443 ; near-field transmission systems using leaky cable H04B 5/0018
}
H01Q 13/203
. .
{
Leaky coaxial lines
}
H01Q 13/206
. .
{
Microstrip transmission line antennas
}
H01Q 13/22
. .
Longitudinal slot in boundary wall of waveguide or transmission line
{
( H01Q 13/203 takes precedence )
}
H01Q 13/24
. .
constituted by a dielectric or ferromagnetic rod or pipe ( H01Q 13/28 takes precedence )
H01Q 13/26
. .
Surface waveguide constituted by a single conductor, e.g. strip conductor
H01Q 13/28
. .
comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements, conductive elements forming artificial dielectric ( Yagi aerials H01Q 19/30 )
Collapse
H01Q 15/00
Devices for reflection, refraction, diffraction, or polarisation of waves radiated from an aerial, e.g. quasi-optical devices ( variable for purpose of altering directivity H01Q 3/00 ; arrangements of such devices for guiding waves H01P 3/20 ; variable for purpose of modulation H03C 7/02 )
Collapse
H01Q 15/0006
.
{
Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices ( H01Q 15/12 , H01Q 15/22 , H01Q 15/24 take precedence )
}
Collapse
H01Q 15/0013
. .
{
said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
}
H01Q 15/002
. . .
{
said selective devices being reconfigurable or tunable, e.g. using switches or diodes
}
H01Q 15/0026
. . .
{
said selective devices having a stacked geometry or having multiple layers
}
H01Q 15/0033
. . .
{
used for beam splitting or combining, e.g. acting as a quasi-optical multiplexer ( H01Q 19/191 and H01Q 19/195 take precedence )
}
H01Q 15/004
. . .
{
using superconducting materials or magnetised substrates
}
H01Q 15/0046
. . .
{
Theoretical analysis and design methods of such selective devices
}
H01Q 15/0053
. .
{
Selective devices used as spatial filter or angular sidelobe filter
}
Collapse
H01Q 15/006
. .
{
Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
}
H01Q 15/0066
. . .
{
said selective devices being reconfigurable, tunable or controllable, e.g. using switches
}
H01Q 15/0073
. . .
{
said selective devices having corrugations
}
H01Q 15/008
. . .
{
said selective devices having Sievenpipers' mushroom elements
}
H01Q 15/0086
. .
{
said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
}
H01Q 15/0093
. .
{
having a fractal shape
}
Collapse
H01Q 15/02
.
Refracting or diffracting devices, e.g. lens, prism
H01Q 15/04
. .
comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens
H01Q 15/06
. .
comprising plurality of wave-guiding channels of different length
H01Q 15/08
. .
formed of solid dielectric material
H01Q 15/10
. .
comprising three-dimensional array of impedance discontinuities, e.g. holes in conductive surfaces or conductive discs forming artificial dielectric ( leaky-waveguide aerials H01Q 13/28 )
H01Q 15/12
. .
functioning also as polarisation filter
{
( polarisation converters H01Q 15/242 )
}
Collapse
H01Q 15/14
.
Reflecting surfaces ; Equivalent structures
{
( electromagnetic shields H01Q 1/526 ; radar-reflecting targets in general F41J 2/00 )
}
Collapse
H01Q 15/141
. .
{
Apparatus or processes specially adapted for manufacturing reflecting surfaces
}
Collapse
H01Q 15/142
. . .
{
using insulating material for supporting the reflecting surface
}
H01Q 15/144
. . . .
{
with a honeycomb, cellular or foamed sandwich structure
}
H01Q 15/145
. .
{
comprising a plurality of reflecting particles, e.g. radar chaff ( missiles of the signal type provided with means for disseminating radar-reflecting chaff F42B 12/70 )
}
H01Q 15/147
. .
{
provided with means for controlling or monitoring the shape of the reflecting surface ( for scanning H01Q 3/01 ; aerials or aerial systems providing multiple beamwidths H01Q 25/002 )
}
H01Q 15/148
. .
{
with means for varying the reflecting properties ( H01Q 15/147 takes precedence )
}
Collapse
H01Q 15/16
. .
Curved in two dimensions, e.g. paraboloidal
Collapse
H01Q 15/161
. . .
{
Collapsible reflectors
}
H01Q 15/162
. . . .
{
composed of a plurality of rigid panels
}
H01Q 15/163
. . . .
{
inflatable
}
Collapse
H01Q 15/165
. . .
{
composed of a plurality of rigid panels ( collapsible H01Q 15/161 )
}
H01Q 15/166
. . . .
{
sector shaped
}
H01Q 15/167
. . . .
{
comprising a gap between adjacent panels or group of panels, e.g. stepped reflectors
}
H01Q 15/168
. . .
{
Mesh reflectors mounted on a non-collapsible frame
}
Collapse
H01Q 15/18
. .
comprising plurality of mutually inclined plane surfaces, e.g. corner reflector
{
( H01Q 15/16 takes precedence )
}
H01Q 15/20
. . .
Collapsible reflectors
H01Q 15/22
. .
functioning also as polarisation filter
{
( in combination with polarising devices H01Q 15/24 )
}
H01Q 15/23
.
Combinations of reflecting surfaces with refracting or diffracting devices
Collapse
H01Q 15/24
.
Polarising devices ; Polarisation filters ( devices functioning simultaneously both as polarisation filters and as refracting or diffracting devices or as reflectors H01Q 15/12 , H01Q 15/22 )
Collapse
H01Q 15/242
. .
{
Polarisation converters
}
H01Q 15/244
. . .
{
converting a linear polarised wave into a circular polarised wave ( guided wave H01P 1/17 )
}
Collapse
H01Q 15/246
. . .
{
rotating the plane of polarisation of a linear polarised wave ( guided wave H01P 1/165 )
}
H01Q 15/248
. . . .
{
using a reflecting surface, e.g. twist reflector ( combination with a polarisation filter in dual reflector antennas H01Q 19/195 )
}
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H01Q 17/00
Devices for absorbing waves radiated from an aerial ; Combinations of such devices with active aerial elements or systems
{
( anechoic chambers G01R 29/105 )
}
H01Q 17/001
.
{
for modifying the directional characteristic of an aerial
}
H01Q 17/002
.
{
using short elongated elements as dissipative material, e.g. metallic threads or flake-like particles
}
H01Q 17/004
.
{
using non-directional dissipative particles, e.g. ferrite powders ( H01Q 17/005 takes precedence; flake-like H01Q 17/002 )
}
H01Q 17/005
.
{
using woven or wound filaments; impregnated nets or clothes
}
H01Q 17/007
.
{
with means for controlling the absorption
}
H01Q 17/008
.
{
with a particular shape ( H01Q 17/007 takes precedence )
}
Collapse
H01Q 19/00
Combinations of primary active aerial elements and units with secondary devices, e.g. with quasi-optical devices, for giving the aerial a desired directional characteristic
{
( combination of horns with slotted waveguide array H01Q 13/0233 )
}
H01Q 19/005
.
{
Patch antenna using one or more coplanar parasitic elements
}
Collapse
H01Q 19/02
.
Details
{
( fastening of an element on a boom H01Q 1/1228 )
}
Collapse
H01Q 19/021
. .
{
Means for reducing undesirable effects
}
H01Q 19/022
. . .
{
for reducing the edge scattering of reflectors
}
H01Q 19/023
. . .
{
for reducing the scattering of mounting structures, e.g. of the struts
}
H01Q 19/025
. . .
{
for optimizing the matching of the primary feed, e.g. vertex plates
}
H01Q 19/026
. . .
{
for reducing the primary feed spill-over
}
H01Q 19/027
. . .
{
for compensating or reducing aperture blockage ( offset feeding H01Q 19/132 , H01Q 19/192 )
}
H01Q 19/028
. . .
{
for reducing the cross polarisation
}
H01Q 19/04
. .
Means for collapsing H-aerials or Yagi aerials
Collapse
H01Q 19/06
.
using refracting or diffracting devices, e.g. lens
{
( radome H01Q 1/42 )
}
Collapse
H01Q 19/062
. .
{
for focusing
}
H01Q 19/065
. . .
{
Zone plate type antennas
}
H01Q 19/067
. .
{
using a hologram
}
H01Q 19/08
. .
for modifying the radiation pattern of a radiating horn in which it is located
{
( corrugated horns H01Q 13/0208 ; producing a circular polarisation H01Q 13/0241 )
}
H01Q 19/09
. .
wherein the primary active element is coated with or embedded in a dielectric or magnetic material ( protective material H01Q 1/40 ; with variable characteristics H01Q 3/44 )
Collapse
H01Q 19/10
.
using reflecting surfaces
H01Q 19/102
. .
{
wherein the surfaces are of convex toroïdal shape ( biconical horns H01Q 13/04 )
}
H01Q 19/104
. .
{
using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas ( periscopic fed Cassegrain antennas H01Q19/19C3 ; passive relays H04B 7/145 )
}
H01Q 19/106
. .
{
using two or more intersecting plane surfaces, e.g. corner reflector antennas
}
H01Q 19/108
. .
{
Combination of a dipole with a plane reflecting surface ( H01Q 19/106 takes precedence; strip line H01Q 9/065 )
}
Collapse
H01Q 19/12
. .
wherein the surfaces are concave ( H01Q 19/18 takes precedence )
Collapse
H01Q 19/13
. . .
the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination ( H01Q 19/15 takes precedence )
H01Q 19/132
. . . .
{
Horn reflector antennas; Off-set feeding
}
Collapse
H01Q 19/134
. . . .
{
Rear-feeds; Splash plate feeds
}
H01Q 19/136
. . . . .
{
cross-polarised
}
H01Q 19/138
. . . .
{
Parallel-plate feeds, e.g. pill-box, cheese aerials
}
H01Q 19/15
. . .
the primary radiating source being a line source, e.g. leaky waveguide aerials
Collapse
H01Q 19/17
. . .
the primary radiating source comprising two or more radiating elements ( H01Q 19/15 , H01Q 25/00 take precedence )
H01Q 19/175
. . . .
{
arrayed along the focal line of a cylindrical focusing surface
}
Collapse
H01Q 19/18
. .
having two or more spaced reflecting surfaces (
{
surfaces of convex toroïdal shape H01Q 19/102 ; using a deflecting plane mirror H01Q 19/104 ; splash plate feeds H01Q 19/134
}
 ; producing pencil beam by two cylindrical reflectors with their focal lines orthogonally disposed H01Q 19/20 )
H01Q 19/185
. . .
wherein the surfaces are plane
Collapse
H01Q 19/19
. . .
comprising one main concave reflecting surface associated with an auxiliary reflecting surface
H01Q 19/191
. . . .
{
wherein the primary active element uses one or more deflecting surfaces, e.g. beam waveguide feeds
}
H01Q 19/192
. . . .
{
with dual offset reflectors
}
H01Q 19/193
. . . .
{
with feed supported subreflector ( splash plate feeds H01Q 19/134 )
}
H01Q 19/195
. . . .
wherein a reflecting surface acts also as a polarisation filter or a polarising device
H01Q 19/20
.
Producing pencil beam by two cylindrical focusing devices with their focal lines orthogonally disposed
Collapse
H01Q 19/22
.
using a secondary device in the form of a single substantially straight conductive element
H01Q 19/24
. .
the primary active element being centre-fed and substantially straight, e.g. H-aerial
H01Q 19/26
. .
the primary active element being end-fed and elongated
Collapse
H01Q 19/28
.
using a secondary device in the form of two or more substantially straight conductive elements ( log-periodic aerials H01Q 11/10 ; constituting a reflecting surface H01Q 19/10 )
H01Q 19/30
. .
the primary active element being centre-fed and substantially straight, e.g. Yagi-aerial
H01Q 19/32
. .
the primary active element being end-fed and elongated
Collapse
H01Q 21/00
Aerial arrays or systems ( producing a beam the orientation or the shape of the directional pattern of which can be changed or varied H01Q 3/00 ;
{
combination of imbricated aerials or arrays operating on different wavebands H01Q 5/0006
}
 ; electrically-long aerials H01Q 11/00 )
NOTE
-
This group includes:

- arrays comprising two or more individually energised
similar active aerial units spaced apart;
- combinations of different types of active aerials or
arrays;
- combinations of substantially independant non-interacting
active aerials or arrays.

Collapse
H01Q 21/0006
.
{
Particular feeding systems
}
H01Q 21/0012
. .
{
Radial guide fed arrays
}
H01Q 21/0018
. .
{
Space- fed arrays
}
H01Q 21/0025
. .
{
Modular arrays
}
H01Q 21/0031
. .
{
Parallel-plate fed arrays; Lens-fed arrays ( multibeam arrays H01Q 25/008 )
}
Collapse
H01Q 21/0037
. .
{
linear waveguide fed arrays
}
Collapse
H01Q 21/0043
. . .
{
Slotted waveguides ( combination with horns H01Q 13/0233 )
}
Collapse
H01Q 21/005
. . . .
{
Slotted waveguides arrays
}
H01Q 21/0056
. . . . .
{
Conically or cylindrically arrayed
}
H01Q 21/0062
. . . .
{
the slots being disposed around the feeding waveguide
}
H01Q 21/0068
. . .
{
Dielectric waveguide fed arrays
}
Collapse
H01Q 21/0075
. .
{
Stripline fed arrays ( H01Q 21/065 takes precedence )
}
H01Q 21/0081
. . .
{
using suspended striplines
}
Collapse
H01Q 21/0087
.
{
Apparatus or processes specially adapted for manufacturing antenna arrays ( manufacturing waveguides H01P 11/00 )
}
H01Q 21/0093
. .
{
Monolithic arrays
}
Collapse
H01Q 21/06
.
Arrays of individually energised active aerial units similarly polarised and spaced apart
Collapse
H01Q 21/061
. .
{
Two dimensional planar arrays
}
H01Q 21/062
. . .
{
using dipole aerials; ( H01Q 21/067 , H01Q 21/068 take precedence )
}
H01Q 21/064
. . .
{
using horn or slot aerials ( slotted waveguides arrays H01Q 21/005 )
}
H01Q 21/065
. . .
{
Patch antenna array
}
H01Q 21/067
. . .
{
using endfire radiating aerial units transverse to the plane of the array
}
H01Q 21/068
. . .
{
using parallel coplanar travelling wave or leaky wave aerial units ( H01Q 21/065 takes precedence )
}
Collapse
H01Q 21/08
. .
the units being spaced along or adjacent to a rectilinear path
{
( waveguide fed H01Q 21/0037 )
}
H01Q 21/10
. . .
Collinear arrangements of substantially straight elongated conductive units
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H01Q 21/12
. . .
Parallel arrangements of substantially straight elongated conductive units ( travelling-wave aerials comprising transmission line loaded with transverse elements, e.g. "fishbone" aerial H01Q 11/04 )
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H01Q 21/14
. . . .
Adcock aerials
H01Q 21/16
. . . . .
U-type
H01Q 21/18
. . . . .
H-type
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H01Q 21/20
. .
the units being spaced along or adjacent to a curvilinear path
{
slotted waveguide arrays H01Q 21/005 ; circularly or helically slotted waveguides H01Q 21/0062
}
H01Q 21/205
. . .
{
providing an omnidirectional coverage ( turnstile aerials H01Q 21/26 )
}
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H01Q 21/22
. .
Aerial units of the array energised non-uniformly in amplitude or phase, e.g. tapered array, binomial array
H01Q 21/225
. . .
{
Finite focus antenna arrays
}
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H01Q 21/24
.
Combinations of aerial elements or aerial units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
{
( circularly polarised patch antennas H01Q 9/0428 ; circularly polarised horns H01Q 13/0241 ; cross-polarised horns H01Q 13/0258 ; polarisation converters H01Q 15/242 ; cross-polarised rear feeds H01Q 19/136 ; crossed polarisation dual antenna H01Q 25/001 )
}
H01Q 21/245
. .
{
provided with means for varying the polarisation ( polarising devices H01Q 15/24 ; tracking by comparing linear polarisation compounds G01S 3/146 ; reducing depolarisation effects H04B 7/00 polarisation diversity H04B 7/10 )
}
H01Q 21/26
. .
Turnstile or like aerials comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
H01Q 21/28
.
Combinations of substantially independent non-interacting aerial units or systems
{
( multiple beam H01Q 25/00 )
}
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H01Q 21/29
.
Combinations of different interacting aerial units for giving a desired directional characteristic ( H01Q 25/00 takes precedence )
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H01Q 21/293
. .
{
one unit or more being an array of identical aerial elements ( adaptive arrays H01Q 3/2605 )
}
H01Q 21/296
. . .
{
Multiplicative arrays
}
H01Q 21/30
.
Combinations of separate aerial units operating in different wavebands and connected to a common feeder system
H01Q 23/00
Aerials with active circuits or circuit elements integrated within them or attached to them
NOTE
-
Group H01Q 23/00 includes only such combinations in which the type of aerial or aerial element is immaterial. Combinations with a particular type of aerial are classified in the group appropriate to that type.

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H01Q 25/00
Aerials or aerial systems providing at least two radiating patterns ( arrangements for changing or varying the orientation or the shape of the directional pattern H01Q 3/00 )
H01Q 25/001
.
{
Crossed polarisation dual antennas ( orthomode horns H01Q 13/0258 ; cross-polarised rear feeds H01Q 19/136 ; orthomode transducers H01P 1/161 )
}
H01Q 25/002
.
{
providing at least two patterns of different beamwidth; Variable beamwidth antennas
}
H01Q 25/004
.
{
providing two or four symmetrical beams for Janus application
}
H01Q 25/005
.
{
providing two patterns of opposite direction; back to back antennas ( H01Q 25/004 takes precedence )
}
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H01Q 25/007
.
{
using two or more primary active elements in the focal region of a focusing device ( for operation on different wavebands H01Q5/00C2 )
}
H01Q 25/008
. .
{
lens fed multibeam arrays
}
H01Q 25/02
.
providing sum and difference patterns ( multimode aerials H01Q 25/04 )
H01Q 25/04
.
Multimode aerials
{
( corrugated horns H01Q 13/0208 )
}
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Last Modified: 04/16/2013 4:31:16 PM