Dualfunction Dielectric Resonator as Antenna and Phase-Delay-Line Load : Designs of Compact Circularly Polarized/Differential Antennas

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 number8089359
Pages (from-to)414-419
Journal / PublicationIEEE Transactions on Antennas and Propagation
Volume66
Issue number1
Online published30 Oct 2017
Publication statusPublished - Jan 2018

Abstract

Dualfunction cylindrical dielectric resonator (DR) used as the load of a broadband phase delay line (PDL) and as a DR antenna (DRA) is presented for the first time. In the broadband PDL design, the cylindrical DR is used as the load to improve impedance match and phase shift. At the same time, the delay line is used to feed the same DR for the antenna part. By designing 90° and 180° PDLs, circularly polarized (CP) and differential DRAs can be obtained, respectively. As compared with those using a hybrid coupler, the new CP and differential DRAs can be made much more compact. Also, the external 50 Ω load required by the hybrid coupler can now be avoided. For demonstration, two CP and differential cylindrical DRAs for 2.4 GHz WLAN applications are designed, fabricated, and tested. Good agreement between the measured and simulated results is observed. The CP design has an overlapping axial ratio and impedance passband of 24.2%. For the differential design, a broadside radiation mode with very low cross-polarization level is obtained.

Research Area(s)

  • Circular polarization, dielectric resonator antenna (DRA), differential antenna, dual-function, phase delay line (PDL)

Citation Format(s)

Dualfunction Dielectric Resonator as Antenna and Phase-Delay-Line Load : Designs of Compact Circularly Polarized/Differential Antennas. / Sun, Yu-Xiang; Leung, Kwok Wa; Mao, Jun-Fa.

In: IEEE Transactions on Antennas and Propagation, Vol. 66, No. 1, 8089359, 01.2018, p. 414-419.

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