Wideband Pattern-Reconfigurable Antenna with Switchable Broadside and Conical Beams

Wei Lin, Hang Wong, Richard W. Ziolkowski

Research output: Contribution to journalArticle

77 Scopus citations

Abstract

A wideband, pattern-reconfigurable antenna is reported that is, for example, a good candidate for ceiling-mounted indoor wireless systems. Switchable linearly polarized broadside and conical radiation patterns are achieved by systematically integrating a wideband low-profile monopolar patch antenna with a wideband L-probe fed patch antenna. The monopolar patch acts as the ground for the L-probe fed patch, which is fed with a coaxial cable that replaces one shorting via of the monopolar patch to avoid deterioration of the conical-beam pattern. A simple switching feed network facilitates the pattern reconfigurability. A prototype was fabricated and tested. The measured results confirm the predicted wideband radiation performance. The operational impedance bandwidth, i.e., S 11 ≤-10 dB, is obtained as the overlap of the bands associated with both pattern modalities. It is wide, from 2.25 to 2.85 GHz (23.5%). Switchable broadside and conical radiation patterns are observed across this entire operating bandwidth. The peak measured gain was 8.2 dBi for the broadside mode and 6.9 dBi for the conical mode. The overall profile of this antenna is 0.13λ 0 at its lowest operating frequency.

Original languageEnglish (US)
Article number8007174
Pages (from-to)2638-2641
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Volume16
DOIs
StatePublished - Aug 10 2017

Keywords

  • Broadside pattern
  • conical pattern
  • patch antennas
  • pattern-reconfigurable antennas
  • reconfigurable antennas
  • wideband

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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