A New Wideband Circularly Polarized Stair-Shaped Dielectric Resonator Antenna

Author

Fakhte, Saeed ; Oraizi, Homayoon ; Karimian, Reza ; Fakhte, Rasoul

Author_Institution

Department of Electrical Engineering, Center of Excellence in Railway Transportation, Iran University of Science and Technology, Tehran, Iran

Volume

63

Issue

4

fYear

2015

fDate

Apr-15

Firstpage

1828

Lastpage

1832

Abstract

A circularly polarized stair-shaped dielectric resonator antenna (DRA) with a wideband circular polarization (CP) radiation is introduced for wireless local area network (WLAN) applications. This antenna is implemented by using two rectangular dielectric resonators (DRs), which are joined together to form a stair-shaped dielectric resonator antenna (DRA). In this structure, the excitation of multiple orthogonal modes leads to a wideband CP bandwidth. Measured results show that the proposed antenna has an axial ratio (AR) bandwidth of 22% (5.2–6.5 GHz), an impedance bandwidth of 37% (4.6–6.7 GHz), and a peak gain of 5.7 dB. In addition, the antenna radiation efficiency of more than 90% is achieved.

Keywords

Antenna measurements; Dielectric resonator antennas; Dielectrics; Electric fields; Feeds; Probes; Resonant frequency; Axial ratio (AR); Dielectric resonator (DR); circular polarization (CP); dielectric resonator (DR); dielectric resonator antenna (DRA);

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2392131

Filename

7009976