An S / Ka -band shared-aperture antenna array with grating lobe suppression in millimeter-wave band

IEICE Electronics Express

article

Wenyu Ma¹  Wenquan Cao¹  Yangkun Zhu¹  Danhua Li¹  Yixin Tong¹  Bangning Zhang¹ 

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

关键词: antenna array;    shared-aperture antenna;    substrate integrated waveguide (SIW);    high-order mode;    grating lobe suppression;   

DOI  :  10.1587/elex.19.20220250

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

A dual frequency shared-aperture antenna array with grating lobe suppression in millimeter wave (mmW) band is investigated in this letter. It consists of a patch antenna working at 2.34GHz with the fundamental TM10 mode and a slotted substrate integrated waveguide (SIW) cavity-backed antenna array working at 28.5GHz with the element excited in TE440 cavity mode. The ground of mmW slot array antenna is employed as the radiation patch in microwave band, so high aperture reuse efficiency can be realized. By using a staggered distribution technique, the serious grating lobe of the high-order mode SIW antenna array with large element spacing can be greatly suppressed. A prototype is fabricated and the measurement grating lobe levels are lower than -18.5dB at 28.5GHz. The ratio of two antennas operating frequency reaches 12.1:1. The measured channel isolation between the two parts reaches -45dB at 2.35GHz and -35dB at 28.5GHz, respectively.

【 授权许可】

CC BY