Circularly Polarized Antenna Having Two Linked Slot-Rings

Author

Chang, The-Nan ; Lin, Jyun-Ming

Author_Institution

Electr. Eng., Tatung Univ., Taipei, Taiwan

Volume

59

Issue

8

fYear

2011

Firstpage

3057

Lastpage

3060

Abstract

A broadband circularly polarized slot-ring type antenna is presented. Two square slot-rings are linked over the corner. By tuning the size of the slot-rings, both the return-loss and the axial-ratio bandwidths can be enhanced. The bandwidth is enhanced by merging the first and second bands. The first band is due to the individual loop whereas the second band is introduced by the linked structure. The structure can also be viewed as a combination of two perturbed square rings. The perturbation causes the generation of a circularly polarized wave. The measured 3 dB axial-ratio bandwidth is 1.05 GHz centered at 3.1 GHz.

Keywords

broadband antennas; microwave antennas; polarisation; slot antennas; axial ratio bandwidth; broadband circularly polarized slot-ring type antenna; circularly polarized antenna; circularly polarized wave; frequency 1.05 GHz; frequency 3.1 GHz; linked structure; perturbed square ring; two linked slot ring; Antenna measurements; Bandwidth; Broadband antennas; Loss measurement; Microstrip; Microstrip antennas; Slot antennas; Broadband antennas; slot antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2011.2158956

Filename

5871274