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

Chang Liu, Hao Luo, Guoqiang Zhao, Houjun Sun

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

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 ortho-mode 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 |S11| < -15dB, |S22|< -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 θ = 40°- 80°.

Original languageEnglish
Title of host publication2019 IEEE MTT-S International Wireless Symposium, IWS 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728107165
DOIs
Publication statusPublished - May 2019
Event2019 IEEE MTT-S International Wireless Symposium, IWS 2019 - Guangzhou, China
Duration: 19 May 201922 May 2019

Publication series

Name2019 IEEE MTT-S International Wireless Symposium, IWS 2019 - Proceedings

Conference

Conference2019 IEEE MTT-S International Wireless Symposium, IWS 2019
Country/TerritoryChina
CityGuangzhou
Period19/05/1922/05/19

Keywords

  • W-band
  • circularly polarized (CP) antenna
  • omnidirectional antenna
  • ortho-mode transducer (OMT)

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