W-band multimode monopulse horn feed for reflector antenna

被引：2

作者：

Chen, Yang ^{[1
]}

Wang, Yihui ^{[1
]}

Meng, Hongfu ^{[1
,2
,3
]}

Dou, Wenbin ^{[1
]}

机构：

[1] Southeast Univ, Sch Informat Sci & Engn, State Key Lab Millimeter Waves, Nanjing, Peoples R China

[2] Purple Mt Labs, Nanjing, Peoples R China

[3] Purple Mt Labs, Nanjing 211111, Peoples R China

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2024年 / 66卷 / 02期

关键词：

E-plane comparator; monopulse feed; multimode horn; reflector antenna; W-band; DESIGN;

D O I：

10.1002/mop.34053

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter proposes a W-band multimode monopulse horn (MMH) feed to improve the total efficiency (TE) of the reflector antenna. The feed consists of a MMH and a single-layer comparator. The MMH utilizes one pyramidal horn and four rectangular waveguides (RWGs) for feeding. The eight electric modes required in the MMH yield excellent sum and difference patterns. The impact of unwanted modes is suppressed using a 90 degrees phase difference approach. The comparator contains four novel 3 dB couplers and E-plane RWGs, providing low loss and high multiport transmission performance. The MMH feed has been fabricated, tested, and applied to a Cassegrain antenna. The measured maximal TE for the Cassegrain antenna between 90 and 97 GHz is 54.9%. The realized gain of the sum beam is 40.3 dBi at 93.5 GHz. The null depths of difference beams in the azimuth and elevation planes are about -37.7 and -29.1 dB, respectively.

引用

页数：10

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