Design of a W-band Omnidirectional Circularly Polarized Antenna by Using OMT

被引：0
作者：
Liu, Chang [1 ]
Luo, Hao [1 ]
Zhao, Guoqiang [1 ]
Sun, Houjun [1 ]
机构：
[1] Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China
来源：
2019 IEEE MTT-S INTERNATIONAL WIRELESS SYMPOSIUM (IWS 2019) | 2019年
关键词：
W-band; ortho-mode transducer (OMT); circularly polarized (CP) antenna; omnidirectional antenna;
D O I：
10.1109/ieee-iws.2019.8803985
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：
An omnidirectional circularly polarized (CP) antenna operating in W-band is proposed. The antenna has a simple structure, which consists of a dual-reflector antenna, an orthomode transducer (OMT) and a 3-dB coupler. The OMT adopts a novel septum-free structure, and can realize wideband, high isolation, and low loss. The results show that the dual-reflector antenna with this OMT has an impedance bandwidth from 91.1 to 96.8 GHz (the overlapped bandwidth limited by vertical bar S-11 vertical bar <-15dB, vertical bar S-22 vertical bar <-15dB) and a 3-dB axial-ratio bandwidth from 93.1 to 95.9 GHz. In addition, the omnidirectional CP radiation pattern can be obtained in the azimuth plane of 0 = 40 degrees-80 degrees.
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页数：3
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