US 9,812,781 B2
Antenna apparatus for transmitting data of a fill-level measuring device
Thomas Blodt, Basel (CH)
Assigned to Endress + Hauser GmbH + Co. KG, Maulburg (DE)
Appl. No. 14/648,962
Filed by Endress + Hauser GmbH + Co. KG, Maulburg (DE)
PCT Filed Nov. 26, 2013, PCT No. PCT/EP2013/074689
§ 371(c)(1), (2) Date Jun. 2, 2015,
PCT Pub. No. WO2014/086616, PCT Pub. Date Jun. 12, 2014.
Claims priority of application No. 10 2012 111 732 (DE), filed on Dec. 3, 2012.
Prior Publication US 2015/0325916 A1, Nov. 12, 2015
Int. Cl. H01Q 7/08 (2006.01); H01Q 7/00 (2006.01); H01Q 7/06 (2006.01); H01Q 1/22 (2006.01)
CPC H01Q 7/00 (2013.01) [H01Q 1/225 (2013.01); H01Q 7/06 (2013.01); H01Q 7/08 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An antenna apparatus for transmitting data of a fill-level measuring device, comprising:
at least two coil arrangements, said coil arrangements have a coil length (li) and a coil diameter (di), wherein:
the coil diameter (di) is less than the associated coil length (li);
said coil arrangements each intersect a straight line (e) in such a way that the straight line (e) and the longitudinal axis of said coil arrangements form at their intersection an angle of 90°;
the intersection of each coil arrangement is arranged at a position between

OG Complex Work Unit Drawing
said at least two coil arrangements are arranged along this line (e) in a sequence, which the coil lengths li of the coil arrangements monotonically decrease l1>l2> . . . ln; and
said at least two coil arrangements, in each case, have a separation along the line (e) between the coil arrangement (i) and (i+1), which is, at most, exactly as large, as the coil length (li) of the longer coil, respectively.