A Wideband High-Gain Circularly-Polarized Antenna Using Artificial Anisotropic Polarizer

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

View graph of relations

Detail(s)

Original languageEnglish
Journal / PublicationIEEE Transactions on Antennas and Propagation
Early online date25 Jun 2019
Publication statusE-pub ahead of print - 25 Jun 2019

Abstract

A novel wideband high-gain circularly-polarized (CP) antenna is proposed and investigated for the 60-GHz high-throughput communication and the 77 GHz automobile radar system. The design consists of a rectangular horn, a hyperbolic lens and an artificial anisotropic polarizer. To minimize the thickness of the polarizer, the properties of the artificial anisotropic material (AAM) for generating CP wave is discussed analytically. Minimal polarizer thickness and the corresponding component ratio are provided mathematically. In comparison with other approaches, the proposed design achieves a relatively high-gain and wideband performance with a minimal thickness. The antenna exhibits a wide impedance bandwidth of more than 39% (VSWR < 2) from 55 to 82 GHz and a wide axial ratio (AR) bandwidth of more than 32% (AR < 3 dB) from 56 to 77 GHz. The average gain is 17 dBic. Good unidirectional radiation characteristics are achieved with low fabrication cost. In addition, the off-body lens and the polarizer could be directly migrated to other radiating sources with the concrete analytical guidance for polarizer design.

Research Area(s)

  • Artificial anisotropic polarizer, circular polarization, wide bandwidth, high gain, 3D print, 60-GHz