Bandwidth and F-B Ratio Enhancements of an Electrically-Small Crossed-Dipole Antenna Using an NFRP Reflector

Son Xuat Ta, Ikmo Park, Richard W. Ziolkowski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In this paper, a compact single-feed crossed-dipole antenna backed by a near-field resonant parasitic (NFRP) element is proposed to enhance the bandwidth and front-to-back (F-B) ratio of the electrically small antenna system. The NFRP element is designed to not only act as a reflector, but also to generate an extra resonance with circularly polarized (CP) radiation for the antenna system. The extra resonances are utilized to broaden the antenna bandwidth. The final design with an overall size of 35 mm ´ 35 mm ´ 13.7 mm (0.184λo ´ 0.184λo ´ 0.072λo at 1.575 GHz) has a |S11| < −10 dB bandwidth of 20.3% (1.485–1.820 GHz), a 3-dB axial ratio bandwidth of 9.46% (1.510–1.660 GHz), and a maximum F-B ratio of 9.8 dB. Relative to the crossed-dipole antenna without a reflector, the proposed design increases the F-B ratio from 0 to 9.8 dB and achieves approximately 150% and 400% increases in |S11| < −10 dB and 3-dB AR bandwidths, respectively.

Original languageEnglish (US)
Title of host publication2017 IEEE Antennas and Propagation Society International Symposium, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages543-544
Number of pages2
ISBN (Electronic)9781538632840
DOIs
StatePublished - Oct 18 2017
Event2017 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2017 - San Diego, United States
Duration: Jul 9 2017Jul 14 2017

Publication series

Name2017 IEEE Antennas and Propagation Society International Symposium, Proceedings
Volume2017-January

Other

Other2017 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2017
CountryUnited States
CitySan Diego
Period7/9/177/14/17

Keywords

  • Broadband
  • Circular polarization
  • Crossed dipole
  • Directive radiation
  • Near-field resonant parasitic reflector

ASJC Scopus subject areas

  • Radiation
  • Computer Networks and Communications
  • Instrumentation

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