Leaky-wave antenna with switchable omnidirectional conical radiation via polarization handedness

Research output: Contribution to journalArticlepeer-review


  • Yahong Liu
  • Meize Li
  • Kun Song
  • Dingshan Hu
  • Xiaopeng Zhao

Colleges, School and Institutes

External organisations

  • Northwestern Polytechnical University
  • Northwestern Polytechnical University


Reconfigurable antennas capable of beam-steering offer an efficient solution to optimize the use of the crowded wireless medium and can serve as a multifunction antenna. Beam-steering is often achieved by antenna geometry switching at the expense of hardware complexity. Here, polarization is used to realize beam-steering without the need of antenna geometry modification. Depending on the handedness of the feed, backward or forward conical radiation is demonstrated in a ∼13λ0-long short-circuited helically slotted waveguide antenna. Tapering the slit width with a Taylor distribution reduces the measured sidelobe levels by ∼3 dB in average and results in a realized gain of 10-13 dB and 11-13 dB for right-handed (backward radiation) and left-handed circularly polarized (forward radiation) feeding, respectively, in the bandwidth from 8.5 to 9.5 GHz.


Original languageEnglish
Pages (from-to)1282-1288
Number of pages7
JournalIEEE Transactions on Antennas and Propagation
Early online date16 Jul 2019
Publication statusPublished - Mar 2020


  • Beam-steering, circular polarization, helical slit antenna, leaky wave antenna, periodic structure

ASJC Scopus subject areas