Microstrip-Fed Circularly Polarized Square-Ring Patch Antenna for GPS Applications

Author

Chen, Hua-Ming ; Wang, Yang-Kai ; Lin, Yi-Fang ; Lin, Che-Yen ; Pan, Shan-Cheng

Author_Institution

Inst. of Photonics & Commun., Nat. Kaohsiung Univ. of Appl. Sci., Kaohsiung

Volume

57

Issue

4

fYear

2009

fDate

4/1/2009 12:00:00 AM

Firstpage

1264

Lastpage

1267

Abstract

A novel coupling technique for circularly polarized square-ring patch antenna is developed and discussed. The circular polarization (CP) radiation of the square-ring patch antenna is achieved by a simple microstrip feed line through the coupling of a square patch on the same plane of the antenna. Proper positioning of the coupling square patch excites two orthogonal resonant modes with 90deg phase difference, and a pure circular polarization is obtained. The dielectric material is a square block of ceramic with a permittivity of 58 and that reduces the size of the antenna. The prototype has been designed, fabricated and found to have an impedance bandwidth of 1.1% and a 3-dB axial-ratio bandwidth of about 0.03% at GPS frequency of 1573 MHz. The characteristics of the proposed antenna have been studied by simulation software HFSS and experiments. The measured and simulated results are in good agreement.

Keywords

Global Positioning System; UHF antennas; antenna feeds; antenna radiation patterns; microstrip antennas; microstrip lines; GPS applications; ceramic square block; circular polarization radiation; coupling technique; dielectric material; frequency 1573 MHz; microstrip feed line; microstrip-fed circularly polarized square-ring patch antenna; simulation software HFSS; Antenna feeds; Bandwidth; Ceramics; Dielectric materials; Global Positioning System; Microstrip antennas; Patch antennas; Permittivity; Polarization; Resonance; Ceramic dielectric material; circular polarization (CP); global position system (GPS); square-ring patch antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2009.2015855

Filename

4812209