Title :
Cross polarization characteristics of annular ring microstrip antennas
Author_Institution :
Iran Telecommun. Res. Center, Tehran, Iran
Abstract :
Theoretical results describing the cross polarization characteristics of coaxially fed annular ring microstrip patch antennas are presented. The cavity model is used to investigate the radiation characteristics of annular microstrip ring radiator. Numerical results showing the variation of cross polarization level for different feed positions and two different outer to inner radius ratio, are given when the patch is excited in the TM/sub 11/ or TM/sub 12/ mode.
Keywords :
antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; waveguide theory; TM/sub 11/ mode; TM/sub 12/ mode; annular microstrip ring radiator; annular ring microstrip antennas; cavity model; coaxially fed patch antennas; cross polarization characteristics; feed positions; outer to inner radius ratio; radiation characteristics; Antenna feeds; Antenna theory; Coaxial components; Dielectric substrates; Geometry; Microstrip antennas; Microstrip components; Patch antennas; Polarization; Resonant frequency;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-4178-3
DOI :
10.1109/APS.1997.631637
