Reconfigurable, Wideband, Low-Profile, Circularly Polarized Antenna and Array Enabled by an Artificial Magnetic Conductor Ground

Wei Lin, Shu Lin Chen, Richard W. Ziolkowski, Y. Jay Guo

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

A reconfigurable, wideband, and low-profile circular polarization (CP) antenna is presented. Its wideband CP reconfigurability is realized by incorporating RF switches into a cross-bowtie radiator. A compact, wide bandwidth, and polarization-independent artificial magnetic conductor ground plane is developed to minimize the overall profile of the antenna while maintaining its wide bandwidth. The simplicity of this single-element design facilitates the realization of a reconfigurable, wide bandwidth CP array that achieves higher directivity without changing its overall profile. Prototypes of the single element and of a 1 × 4 array of these elements were fabricated and tested. The measured results for both prototypes are in good agreement with their simulated values, validating their design principles. They are low profile with a height ∼ 0.05 λ0. The array exhibits a wide fractional operational bandwidth: 1.65 GHz (21.7%), and a high realized gain: 13 dBic. Since they would enhance their channel capacity and avoid polarization mismatch issues, these reconfigurable CP antenna systems are very suitable for modern wireless systems.

Original languageEnglish (US)
Pages (from-to)1564-1569
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Volume66
Issue number3
DOIs
StatePublished - Mar 2018

Keywords

  • Artificial magnetic conductor (AMC)
  • circular polarization (CP)
  • crossed dipoles
  • p-i-n diodes
  • reconfigurable antennas
  • wide bandwidth

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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