Sidelobe suppression for wideband slotted SIW cavity-backed antenna array

IEICE Electronics Express

article

Wenyu Ma¹  Wenquan Cao¹  Yixin Tong¹  Bangning Zhang¹ 

[1] College of Communications Engineering, Army Engineering University of PLA

关键词: antenna array;    substrate integrated waveguide (SIW);    wideband;    low sidelobe level (SLL);   

DOI  :  10.1587/elex.19.20220184

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

A slot antenna array backed by substrate integrated waveguide (SIW) cavity with high gain, wideband and low sidelobe levels (SLLs) is proposed in this letter. Four 2×2 slots antenna elements based on SIW cavity are used as the radiation structure. A broadband SIW corporate-feed network is equipped on the bottom layer to feed antenna array. Due to the broadband characteristics of antenna element and feed network, antenna array with wide band is obtained. Then, through the dislocation distribution of antenna elements, the SLLs of antenna array can get greatly reduced. A prototype has been fabricated using standard PCB process, and measured for verification. As for the measurement results, the impedance bandwidth below -10dB is from 18.2GHz to 21.7GHz (17.5%). The maximum gain is 17.4dBi at 20.5GHz. Most importantly, the SLLs of both E- and H-plane are all lower than -15dB in the working band.

【 授权许可】

CC BY