Dual-Band Circularly Polarized Antenna With Wide Axial Ratio Beamwidths for Upper Hemispherical Coverage

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)58132-58138
Journal / PublicationIEEE Access
Publication statusPublished - 10 Oct 2018


This paper presents a dual-band circularly polarized cross-dipole antenna with wide axial ratio (AR) beamwidth for full upper hemispherical coverage for GPS L1 and L2 bands. The antenna has curved radiating arms and a corrugated back cavity to enhance the beamwidth. A wideband hybrid coupler is used to feed the antenna at the two nearby frequency bands. Experimental results show that very wide 3-dB AR beamwidths of over 200° can be obtained, fully covering the upper hemisphere for the two GPS bands.

Research Area(s)

  • Antenna measurements, Broadbeam antenna, Cavity resonators, circular polarization, cross-dipole antenna, Dual band, dual-band antenna, Feeds, Global Positioning System, GPS antenna, Substrates

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