Broadbeam Cross-Dipole Antenna for GPS Applications

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

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Author(s)

Detail(s)

Original languageEnglish
Article number8013815
Pages (from-to)5605-5610
Journal / PublicationIEEE Transactions on Antennas and Propagation
Volume65
Issue number10
Online published21 Aug 2017
Publication statusPublished - Oct 2017

Abstract

A broadbeam cross-dipole antenna with improved low-elevation gain for global positioning system (GPS) applications is reported. The cross-dipole consists of two perpendicular dipoles, which are printed on two separate substrates that are vertically placed inside a cylindrical back cavity. Circularly polarized fields are generated by applying two quadrature signals with equal amplitude to the dipoles. To enhance the low-elevation gain, circular dipoles, curved ground planes, and corrugated back cavity are deployed in our design. A prototype operating in GPS L1 band (1.575 GHz) was designed with ANSYS HFSS, and measurement was done to verify the simulations. The reflection coefficient, axial ratio (AR), radiation pattern, antenna gain, and antenna efficiency are studied. It is found that the antenna has a wide 3 dB AR beamwidth of over 230° and a 3 dB gain beamwidth of 150°. The measured and simulated antenna gains at Θ = 85° are 0.11 and 0.68 dBic, respectively, which are higher than those of existing designs.

Research Area(s)

  • Circular polarization, cross-dipole antenna, global positioning system (GPS) antenna, wide beamwidth

Citation Format(s)

Broadbeam Cross-Dipole Antenna for GPS Applications. / Sun, Yu-Xiang; Leung, Kwok Wa; Lu, Kai.

In: IEEE Transactions on Antennas and Propagation, Vol. 65, No. 10, 8013815, 10.2017, p. 5605-5610.

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