Summary
International Symposium on Antennas and Propagation
2008
Session Number:4C31
Session:
Number:4C31-1
Patch Antenna with the Same Substrate for GPS L1 and L2 Bands
Ming-Fong Liu, Dau-Chyrh Chang, Chi-Hsiung Lin, Li-Yang Tsai, Song Tsuen Peng,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
There are two bands, L1 (1575 MHz) and L2 (1227 MHz), for different applications at GPS (global positional satellite). Usually, L1 (1575 MHz), L2 (1227 MHz) bands are for military and commercial applications respectively. In order to satisfy the requirements of specification, both dual bands RHCP (right hand circular polarization) patch antenna with the same substrate has been developed for GPS in this paper. The results from both simulation and measurement are in agreement. The measured impedance bandwidths for 10 dB return loss are 15 MHz at L2 band and 27 MHz at L1 band. The measured AR for both bands is smaller than 3 dB for angular coverage from zenith to 70 degrees. The measured gains are 4.68 dBic and 4.89 dBic at L2 and L1 respectively.