Broadband CPW-Fed Circularly Polarized Square Slot Antenna With Lightening-Shaped Feedline and Inverted-L Grounded Strips

Author

Sze, Jia-Yi ; Hsu, Chung-I G. ; Chen, Zhi-Wei ; Chang, Chi-Chaan

Author_Institution

Electr. & Electron. Eng. Dept., Nat. Defense Univ., Taoyuan, Taiwan

Volume

58

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

973

Lastpage

977

Abstract

A novel design is described for a circularly polarized square slot antenna (CPSSA). Circular polarization (CP) operations can be attained using a lightening-shaped feedline protruded from the signal line of the feeding coplanar waveguide (CPW). The CP bandwidth can be significantly enhanced by implanting a pair of inverted-L grounded strips into the slot and adjusting the dimensions of the lightening-shaped feedline, whereas the impedance bandwidth can be greatly enlarged through tuning embedded vertical and horizontal stubs. The designed antenna was measured to exhibit a CP bandwidth of as high as 48.8%.

Keywords

broadband antennas; coplanar waveguides; slot antennas; CPSSA; broadband CPW-fed circularly polarized square slot antenna; coplanar waveguide; impedance bandwidth; inverted-L grounded strips; lightening-shaped feedline; Antenna feeds; Bandwidth; Broadband antennas; Coplanar waveguides; Frequency; Impedance; Microstrip antennas; Optical polarization; Patch antennas; Slot antennas; Axial ratio; circular polarization; square slot antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2009.2039335

Filename

5371942