A novel millimeter‐wave dual‐band circularly polarized dielectric resonator antenna. Issue 10 (10th June 2019)

• Record Type: Journal Article
• Authors: Liu, Yiting; Jiao, Yong‐Chang; Weng, Zibin; Zhang, Chi; Chen, Guantao
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 29:Issue 10(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-06-10
• Subjects: circular polarization -- dielectric resonator antenna -- dual‐band -- millimeter wave; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21871
• Languages: English
• ISSNs: 1096-4290

Abstract

ABSTRACT: In this article, a novel dual‐band circularly polarized (CP) dielectric resonator antenna (DRA) for millimeter‐wave (MMW) band is presented. The rectangular dielectric resonator with layered truncated corners is excited by a microstrip‐coupled cross‐slot. CP radiations in the lower band are realized by utilizing two quasi‐TE111 modes operating at 21.7 GHz and 23.8 GHz, while CP radiations in the upper band are obtained by exciting a quasi‐TE113 mode at 28.2 GHz. The dual‐band DRA is fabricated and measured. Due to the higher order mode, the average gain of the DRA in the upper band is about 3 dB higher than that in the lower band. The measured impedance bandwidths (| S 11 | < −10 dB) are 17.0% (20.5‐24.3 GHz) and 15.2% (26.1‐30.4 GHz), while the measured axial ratio (AR) bandwidths (AR < 3 dB) are 12.8% (21.2‐24.1 GHz) and 5% (27.4‐28.8 GHz). In addition, the peak gain values are 5 and 8 dBic.