Title :
Phase and group delays for circularly-polarized microstrip antennas
Author :
Dong, Weixin ; Jackson, David R. ; Williams, Jeffery T. ; Basilio, Lorena I.
Author_Institution :
Dept. of Electr. & Comput. Eng., Houston Univ., TX
Abstract :
Applications such as high-precision GPS require an accurate characterization of the phase and group delays in the received signal. The purpose of this investigation is to explore and characterize both the phase and group delays for circularly-polarized (CP) microstrip antennas, which are common in GPS systems. Two types of CP patches are examined. The first is a square patch that is fed with a dual feed employing a 90deg phase shifter. The second is a nearly-square patch that is fed along the diagonal. The L1 GPS frequency 1.575 GHz is used in both cases
Keywords :
Global Positioning System; UHF phase shifters; antenna feeds; microstrip antennas; polarisation; CP patches; L1 GPS frequency; circularly-polarized microstrip antennas; dual feed; group delay; high-precision GPS; nearly-square patch; phase delay; phase shifter; square patch; Delay; Equivalent circuits; Feeds; Frequency; Geometry; Global Positioning System; Impedance; Microstrip antennas; Probes; Voltage;
Conference_Titel :
Antennas and Propagation Society International Symposium 2006, IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
1-4244-0123-2
DOI :
10.1109/APS.2006.1710847
