| US 7,525,479 B2 | ||
| Radar apparatus | ||
| Tomohiro Nagai, Nagaokakyo (Japan) | ||
| Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (Japan) | ||
| Filed on Jul. 11, 2008, as Appl. No. 12/171,573. | ||
| Application 12/171573 is a continuation of application No. PCT/JP2006/325530, filed on Dec. 21, 2006. | ||
| Claims priority of application No. 2006-013654 (JP), filed on Jan. 23, 2006. | ||
| Prior Publication US 2008/0291088 A1, Nov. 27, 2008 | ||
| Int. Cl. G01S 13/42 (2006.01); G01S 7/35 (2006.01); G01S 13/32 (2006.01); G01S 13/89 (2006.01); G01S 13/66 (2006.01); G01S 13/93 (2006.01) | ||
| U.S. Cl. 342—158 [342/27; 342/28; 342/70; 342/118; 342/128; 342/146; 342/147; 342/175; 342/176; 342/179; 342/180; 342/195; 701/300; 701/301] | 16 Claims |
| 1. A radar apparatus comprising:
an antenna array in which a plurality of antennas that can transmit as well as receive are arranged; and
a selector that selects a transmitting antenna and a receiving antenna from among the plurality of antennas of the antenna
array,
wherein a transmission wave whose frequency has been modulated is transmitted from the transmitting antenna selected by the
selector, a reflected wave obtained from reflection of the transmission wave is received by one of receiving antennas selected
by the selector by successively switching the receiving antennas, and an azimuth of an object is detected using a phase difference
between reflected waves received by the receiving antennas, and
wherein, of the plurality of antennas in the antenna array, there are N1 antennas that can transmit as well as receive arranged
with a spacing d therebetween at a first end portion of the antenna array, there are N1 antennas that can transmit as well
as receive arranged with a spacing d therebetween at a second end portion of the antenna array, and a spacing between respective
antennas of the first and second end portions that are closest to a central portion of the array is N1×d.
|