Title :
Compact multibeam imaging antenna for automotive radars
Author :
Schoenlinner, B. ; Rebeiz, G.M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
A compact multi-beam 77 GHz antenna has been developed for automotive applications. The antenna consists of a hemispherical Teflon lens with backside metallization, which is fed by endfire tapered slot antennas (TSAs) on a 127 /spl mu/m-thick Duroid/sup TM/ substrate. The TSAs are arranged in a circular arc covering 40/spl deg/ around the hemispherical lens. The measured patterns result in E and H-plane patterns with a 3 dB beamwidth of 5.5/spl deg/, a sidelobe level of -18 to -20 dB and a cross-polarization level of -19 dB. The calculated efficiency of this antenna system is 54%. The off-axis antenna patterns are identical to the broadside patterns due to the symmetrical structure of the antenna. The antenna can provide coverage using a circular feed array around the hemispherical Teflon lens.
Keywords :
antenna radiation patterns; lens antennas; metallisation; multibeam antennas; radar antennas; radar imaging; road vehicle radar; slot antennas; 54 percent; 77 GHz; Duroid substrate; automotive radar; backside metallization; circular feed array; compact multibeam imaging antenna; hemispherical Teflon lens; radiation pattern; tapered slot antenna; Antenna arrays; Antenna feeds; Antenna measurements; Automotive applications; Automotive engineering; Lenses; Metallization; Radar antennas; Radar imaging; Slot antennas;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011925
