Wideband Millimeter-Wave Antenna With Low Cross Polarization Based on Spoof Surface Plasmon Polaritons

Qing-Le Zhang; Bao-Jie Chen; Qian Zhu; Ka Fai Chan; Chi Hou Chan

doi:10.1109/LAWP.2019.2927767

Author(s)

Qing-Le Zhang
Bao-Jie Chen
Qian Zhu
Ka Fai Chan
Chi Hou Chan

Related Research Unit(s)

Detail(s)

Original language	English
Article number	8758940
Pages (from-to)	1681-1685
Journal / Publication	IEEE Antennas and Wireless Propagation Letters
Volume	18
Issue number	8
Online published	10 Jul 2019
Publication status	Published - Aug 2019

Link(s)

DOI	DOI https://doi.org/10.1109/LAWP.2019.2927767 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85070504460&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(a3db059d-7423-471a-b837-905f0116412b).html

Abstract

A novel wideband millimeter-wave antenna with low cross polarization based on spoof surface plasmon polaritons (SPPs) is proposed in this letter. Periodic metallic grooves operate as an SPP transmission line with high electromagnetic field confinement. The concept of dielectric tapered rod antenna is employed to design an SPP rod antenna with linear-tapered groove depth, converting the confined energy to radiation mode. Meanwhile, the tapered structure only affects the E_zcomponent on the transverse plane, and thus it can achieve low cross polarization. This prototype is fabricated by three-dimensional printing technique and surface metallization process. The radiating length of the linear-tapered SPP antenna is 29.2 mm, and the measured |S₁₁| is below -15.6 dB from 50 to 75 GHz. Experimental results show that the linear-tapered antenna can achieve an average gain of 14.95 dBi with ±1.45 dBi variation and better than -25.6 dB cross-polarization level for E-plane radiation.