Design of 94GHz Dual-Polarization Antenna Fed by Diagonal Horn for Cloud Radars

IEEE Access

Junxiang Ge¹  Jie Wang¹  Guangyang Xu¹  Fan Yang¹  Hai Lin¹ 

[1] Department of Electronics and Communication, Nanjing University of Information Science and Technology, Nanjing, China;

关键词: Cassegrain antenna;    diagonal horn antenna;    dual-polarization;    high isolation;    similar beam;   

DOI  :  10.1109/ACCESS.2022.3154483

来源: DOAJ

【 摘 要 】

In this paper, a 94 GHz dual-polarization high-isolation cassegrain antenna feed by a diagonal horn antenna is designed. The antenna consists of a D = 540 mm main reflector, sub-reflector, and dual-port dual-polarization diagonal horn feed antenna. To obtain similar feed horn E-H radiation patterns, gain, high polarization, and port isolation, a dual-port diagonal horn was designed in the feed. The measured antenna gains are 50.85 dBi and the side-lobe levels are −24.5 dB at E-H radiation patterns of two ports at 94 GHz, respectively. The VSWRs of port 1 and port 2 are less than 1.5:1 in the range 93.2–95.3 GHz, which meets the working requirements of frequency modulated continuous wave and pulse cloud radars. And the isolation between the two ports is above −50 dB, whereas the polarization isolation of each port is above 40 dB. The proposed W-band antenna is a suitable candidate for the dual-polarization cloud radars.

【 授权许可】

Unknown