Wideband Pattern-Reconfigurable Antenna with Switchable Broadside and Conical Beams

Wei Lin, Hang Wong, Richard W Ziolkowski

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

A wideband, compact 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., |S11| < -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 0.13λ0 at its lowest operating frequency.

Original languageEnglish (US)
JournalIEEE Antennas and Wireless Propagation Letters
DOIs
StateAccepted/In press - Aug 10 2017
Externally publishedYes

Fingerprint

Microstrip antennas
Antennas
Bandwidth
Coaxial cables
Ceilings
Antenna feeders
Deterioration
Radiation

Keywords

  • Antenna measurements
  • Antenna radiation patterns
  • Broadband antennas
  • broadside pattern
  • conical pattern
  • Gain
  • patch antennas
  • pattern-reconfigurable antennas
  • reconfigurable antennas
  • Switches
  • Wideband
  • wideband

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

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title = "Wideband Pattern-Reconfigurable Antenna with Switchable Broadside and Conical Beams",
abstract = "A wideband, compact 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., |S11| < -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 0.13λ0 at its lowest operating frequency.",
keywords = "Antenna measurements, Antenna radiation patterns, Broadband antennas, broadside pattern, conical pattern, Gain, patch antennas, pattern-reconfigurable antennas, reconfigurable antennas, Switches, Wideband, wideband",
author = "Wei Lin and Hang Wong and Ziolkowski, {Richard W}",
year = "2017",
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doi = "10.1109/LAWP.2017.2738101",
language = "English (US)",
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AU - Wong, Hang

AU - Ziolkowski, Richard W

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N2 - A wideband, compact 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., |S11| < -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 0.13λ0 at its lowest operating frequency.

AB - A wideband, compact 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., |S11| < -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 0.13λ0 at its lowest operating frequency.

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KW - conical pattern

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KW - pattern-reconfigurable antennas

KW - reconfigurable antennas

KW - Switches

KW - Wideband

KW - wideband

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