Gain and Bandwidth Enhancement of a Spiral Antenna Using a Circularly Symmetric HIS

Mikal Askarian Amiri, Constantine Balanis, Craig R. Birtcher

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

A circularly symmetric high-impedance surface (HIS) is used as a ground plane in the design of a low-profile two-arm spiral antenna. It is shown through simulations that an HIS with circular periodicity provides 16% and 11.3% greater operational and fractional bandwidths, respectively, for spiral antennas compared to canonical rectangular HISs. It is also observed that with the aid of a circular HIS ground plane, the gain of the spiral antenna increases for 2.5 dB compared to when a rectangular HIS is used as a ground plane. Measurements are performed to validate the simulations; a very good agreement is indicated.

Original languageEnglish (US)
Article number7723849
Pages (from-to)1080-1083
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Volume16
DOIs
StatePublished - 2017

Keywords

  • Circular high-impedance surface (HIS)
  • low-profile design
  • spiral antenna
  • wideband balun
  • wideband element

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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