Title :
Millimeter-wave planar antenna for car warning radar
Author :
Wagatsuma, Yoshihiko ; Daicho, Yoshinao ; Yoneyama, Tsukasa
Author_Institution :
Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan
Abstract :
A millimeter wave planar antenna is proposed to realize a practical car warning radar. To obtain a very thin radar structure, leaky NRD guide is used to feed the planar antenna and the feeding structure is folded under the antenna aperture with the aid of a short-circuited 3-dB coupler. The fabricated planar antenna is 160 mm×160 mm in area, 11 nm in thickness, and has gain of 31.5 dBi at 59.5 GHz. The half beam widths are 2.1 degrees and 2.8 degrees in E-plane and H-plane, respectively
Keywords :
antenna feeds; millimetre wave antenna arrays; nonradiative dielectric waveguides; planar antenna arrays; radar antennas; road vehicle radar; 59.5 GHz; E-plane; H-plane; car warning radar; feeding structure; half beam widths; leaky NRD guide; millimeter-wave planar antenna; short-circuited 3-dB coupler; thin radar structure; Antenna feeds; Aperture antennas; Aperture coupled antennas; Coupling circuits; Millimeter wave communication; Millimeter wave radar; Millimeter wave technology; Planar arrays; Radar antennas; Structural beams;
Conference_Titel :
Millimeter Waves, 1997 Topical Symposium on
Conference_Location :
Kanagawa
Print_ISBN :
0-7803-3887-1
DOI :
10.1109/TSMW.1997.702500
