Dual-Band Circularly Polarized Cavity-Backed Annular Slot Antenna for GPS Receiver

Author

Wang-Ta Hsieh ; Tze-Hsuan Chang ; Jean-Fu Kiang

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

60

Issue

4

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

2076

Lastpage

2080

Abstract

A circularly polarized (CP) cavity-backed annular slot antenna for GPS receiver is designed to operate in both the L1 and L2 bands of the Global Positioning System (GPS). The measured impedance bandwidths with VSWR less than 2 are 3.7% (1.19-1.235 GHz) and 1.2% (1.565-1.585 GHz), respectively, the measured 3 dB axial-ratio (AR) bandwidth are 0.9% (1.220-1.231 GHz) and 0.6% (1.572-1.581 GHz), respectively. A cavity is designed to render a unidirectional radiation pattern.

Keywords

Global Positioning System; antenna radiation patterns; multifrequency antennas; radio receivers; slot antennas; CP cavity-backed annular slot antenna; GPS receiver; Global Positioning System; VSWR; axial-ratio bandwidth; bandwidth 1.19 GHz to 1.235 GHz; bandwidth 1.220 GHz to 1.231 GHz; bandwidth 1.565 GHz to 1.585 GHz; bandwidth 1.572 GHz to 1.581 GHz; dual-band circularly polarized cavity-backed annular slot antenna; unidirectional radiation pattern; Antenna measurements; Cavity resonators; Global Positioning System; Impedance; Slot antennas; Annular slot; GPS; cavity backed; circular polarization; dual-band;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2012.2186229

Filename

6142036