Dual-Band and Dual-Sense Omnidirectional Circularly Polarized Antenna

Author

Yong Mei Pan ; Shao Yong Zheng ; Weiwei Li

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

Volume

13

fYear

2014

fDate

2014

Firstpage

706

Lastpage

709

Abstract

A circularly polarized (CP) dielectric resonator antenna (DRA) loaded with a modified circular patch is proposed for dual-band applications. The antenna is centrally fed by a probe, giving omnidirectional patterns with different senses of circular polarization in two bands. It is observed that the lower and upper bands are controlled by the patch and dielectric resonator (DR), respectively, making design of the dual-band antenna very easy. For demonstration, a prototype has been designed, fabricated, and measured. The antenna features 10-dB impedance bandwidths of 2.64% and 18.03% and 3-dB axial-ratio (AR) bandwidths of 3.16% and 5.06% in lower and upper frequency bands, respectively.

Keywords

antenna radiation patterns; dielectric resonator antennas; multifrequency antennas; polarisation; DRA; circularly polarized dielectric resonator antenna; dual-band antenna; dual-sense omnidirectional circularly polarized antenna; modified circular patch; omnidirectional patterns; Antenna measurements; Bandwidth; Dielectric resonator antennas; Dual band; Impedance; Reflection coefficient; Circularly polarized antenna; cylindrical dielectric resonator antenna; dual-band antenna; omnidirectional antenna; patch antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2314744

Filename

6782449