Wideband Circularly Polarized Trapezoidal Dielectric Resonator Antenna

Author

Pan, Yongmei ; Leung, Kwok Wa

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China

Volume

9

fYear

2010

fDate

7/2/1905 12:00:00 AM

Firstpage

588

Lastpage

591

Abstract

A wideband circularly polarized (CP) trapezoidal dielectric resonator antenna (DRA) is investigated in this letter. The DRA is simply excited by a single 45° inclined slot fed by a microstrip feed line. It is found that the 3-dB axial ratio (AR) bandwidth of the proposed antenna can be as wide as 21.5%. The antenna gain varies between 5.28 and 8.40 dBi across the antenna passband (3.11-3.86 GHz). This letter also presents a modified trapezoidal DRA that has a notch at its top. The modified version improves the impedance match, as the AR and gain remain almost unchanged. The reflection coefficient, AR, radiation pattern, and antenna gain of each proposed configuration are studied, and reasonable agreement between the measured and simulated results is observed.

Keywords

antenna feeds; antenna radiation patterns; broadband antennas; dielectric resonator antennas; electromagnetic wave polarisation; impedance matching; microwave antennas; slot antennas; DRA; antenna passband; axial ratio bandwidth; frequency 3.11 GHz to 3.86 GHz; inclined slot fed; microstrip feed line; radiation pattern; reflection coefficient; wideband circularly polarized trapezoidal dielectric resonator antenna; Circular polarization; single feed; trapezoidal dielectric resonator antenna (DRA); wideband;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2010.2053910

Filename

5492144