Circularly Polarized Semi-Eccentric Annular Dielectric Resonator Antenna for X-Band Applications

Author

Jong Min Lee ; Sung-Jin Kim ; Gina Kwon ; Chan Mi Song ; Youngoo Yang ; Kang-Yoon Lee ; Keum Cheol Hwang

Author_Institution

Sch. of Electron. & Electr. Eng., Sungkyunkwan Univ., Suwon, South Korea

Volume

14

fYear

2015

fDate

7/7/1905 12:00:00 AM

Firstpage

1810

Lastpage

1813

Abstract

In this letter, a compact single-feed circularly polarized dielectric resonator antenna is proposed for X-band applications. The radiator comprises a semi-eccentric annular dielectric resonator (DR), which is a semi-elliptical DR with a hollow elliptical cylinder. A vertical coaxial probe is located adjacent to a cutting surface of the DR to excite the proposed antenna. The two main design parameters, the aspect ratio of the elliptical DR and the feeding position, were optimized, and a prototype of the antenna was fabricated and tested. The experimental results exhibit a -10-dB reflection bandwidth of 29.14% (9.41-12.62 GHz) and a 3-dB axial-ratio bandwidth of 5.71% (10.37-10.98 GHz). The measured peak gain varies from 4.17 to 4.78 dBic.

Keywords

antenna feeds; dielectric resonator antennas; electromagnetic wave polarisation; loop antennas; microwave antennas; X-band applications; bandwidth 9.41 GHz to 12.62 GHz; circularly polarized semieccentric annular antenna; compact single-feed antenna; cutting surface; dielectric resonator antenna; feeding position; hollow elliptical cylinder; vertical coaxial probe; Antenna measurements; Dielectric resonator antennas; Polarization; Probes; Reflection coefficient; Circular polarization; coaxial probe; dielectric resonator antenna; eccentric annular dielectric resonator;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2015.2435052

Filename

7110313