Title :
A novel small tapered slot antenna for passive imaging sensors
Author :
Sato, Mitsuhisa ; Hirose, Tatsuya ; Sato, Hikaru ; Sawaya, Kunio ; Mizuno, Koji
Author_Institution :
Fujitsu Labs. Ltd., Kanagawa, Japan
Abstract :
We propose a compact planar antenna for a 94-GHz-band passive mm-wave (PMMW) imaging array system. The key feature is a parabolic tapered slot antenna structure with a center cut metal line that controls its radiation pattern and reduces the sidelobe level of the H-plane. By using this structure, we reduced the antenna size by one tenth compared to conventional tapered slot antennas, whereas the actual gain of this antenna was 12.4 dBi. In addition, this antenna has a circular radiation pattern. Therefore, it is suitable for a PMMW imaging array. We also present simple CPW-to-SLOT transitions with insertion loss of 0.5 dB between the 90-100 GHz ranges.
Keywords :
antenna radiation patterns; image sensors; millimetre wave antenna arrays; millimetre wave imaging; slot antenna arrays; 0.5 dB; 12.4 dB; 90 to 100 GHz; 94 GHz; antenna radiation patterns; antenna size; circular radiation pattern; compact planar antenna; coplanar waveguide; imaging sensors; passive mm wave imaging array system; sidelobe level; tapered slot antenna structure; Antenna arrays; Antenna radiation patterns; Aperture antennas; Image sensors; Laboratories; Millimeter wave technology; Sensor arrays; Sensor systems; Shape; Slot antennas;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516544
