Design of CPW-Fed Circularly Polarized Slot Antenna With a Miniature Configuration

Author

Sze, Jia-Yi ; Pan, Shien-Piao

Author_Institution

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

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

1465

Lastpage

1468

Abstract

This letter proposes the design of a new miniaturized circularly polarized (CP) printed square slot antenna (PSSA) fed by a coplanar waveguide (CPW). The characteristics of the design are that the CP operation and impedance matching can be independently achieved. The 3-dB axial-ratio band can be excited by protruding into the slot a halberd-shaped metal strip from the signal line of the CPW, whereas the VSWR ≤ 2 impedance band can be produced by implanting in the slot a grounded asymmetric inverted-T strip. Design rules established for the proposed antenna can effectively reduce the sizes of the ground plane and the slot.

Keywords

coplanar waveguides; impedance matching; microstrip antennas; polarisation; slot antennas; CPW; circular polarization; coplanar waveguide; grounded asymmetric inverted T strip; halberd shaped metal strip; impedance matching; miniature configuration; printed square slot antenna; Antenna measurements; Bandwidth; Broadband antennas; Impedance; Slot antennas; Axial ratio; circular polarization; slot antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2179912

Filename

6105511