Multipolarization-Reconfigurable Circular Patch Antenna with L-Shaped Probes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Article number7807305
Pages (from-to)1549-1552
Journal / PublicationIEEE Antennas and Wireless Propagation Letters
Online published5 Jan 2017
Publication statusPublished - 2017


This letter introduces a multipolarizationreconfigurable circular patch antenna with eight L-shaped probes. By adopting the L-probe feeding structure, the reported circular patch antenna is compact, simple, and low-profile. It has switchable 0°, +45°, 90°, and –45° linear polarizations and is able to mitigate the polarization mismatch problem in complex wireless channels. This polarization reconfigurability is realized by controlling a set of p-i-n diodes via a switchable feeding network. Measured results show that the antenna has excellent electrical performance for all operating states. The overlapping impedance bandwidth (when the reflection coefficient ≤ –10 dB) is 17.6%, from 2.325 to 2.775 GHz, which covers both the WLAN and ISM bands. The gain is very stable across the entire bandwidth with a 6.1-dBi peak value, and the cross-polarization levels are low. Moreover, good cardioid-shaped radiation patterns are attained.

Research Area(s)

  • L-probe feed, multipolarization-reconfigurable antenna, p-i-n diodes, patch antenna, polarization mismatch