Title :
A single-layer SIW slot array antenna with TE20 mode
Author :
Xu, Junfeng ; Chen, Zhi Ning ; Qing, Xianming ; Hong, Wei
Author_Institution :
RF & Opt. Dept., Inst. for Infocomm Res., Singapore, Singapore
Abstract :
The idea of using higher order modes is demonstrated by an SIW slot array antenna with a TE20 mode to realize boresight radiation. In order to excite the TE20 mode, an SIW hybrid coupler and a compact SIW 90° phase shifter are designed to offer the two out-of-phase outputs with identical amplitude. Besides, a CPW-SIW transition is adopted for measurement. The SIW slot array antenna with the TE20 mode is designed at X-band in a single-layer PCB. The measured bandwidth is 5.5% (9.72-10.27 GHz). The measured total efficiency is 80% at 10 GHz. Compared to a conventional SIW slot array just with a power divider, using the TE20 mode provides the merits of not only reducing the number of vias but also relaxing fabrication limit and tolerance which could be the fabrication bottleneck at high frequencies.
Keywords :
coplanar waveguides; microwave antenna arrays; microwave phase shifters; power dividers; slot antenna arrays; substrate integrated waveguides; CPW-SIW transition; SIW hybrid coupler; TE20 mode; X-band antenna; boresight radiation; compact SIW 90° phase shifter; frequency 8 GHz to 12 GHz; out-of-phase outputs; power divider; single-layer PCB; single-layer SIW slot array antenna; substrate integrated waveguide; Antenna arrays; Antenna measurements; Antenna radiation patterns; Arrays; Slot antennas; TE20 mode; single-layer structure; slot array antenna; substrate integrated waveguide;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
