Title :
Mutual coupling between spherical annular-ring and circular microstrip antennas
Author :
Hong-Twu Chen ; Jeen-Sheen Row ; Yuan-Tung Cheng
Author_Institution :
Dept. of Electr. Eng., Chinese Mil. Acad., Fong-Shan, Taiwan
Abstract :
Mutual coupling is an important issue in estimating the performance of a microstrip array antenna. In this article, the coupling characteristics between spherical concentric annular-ring and circular microstrip antennas is studied by using full-wave analysis. Both the annular-ring and the circular patches are fed by a coaxial probe. The circular patch is excited at the TM/sub 11/ mode and the annular-ring patch is operated at the TM/sub 12/ mode. Such a coupling problem is treated as a two-port network and the coupling coefficient, S/sub 12/, can be obtained from the scattering matrix. The numerical results of E-plane and H-plane coupling coefficients are presented and discussed.
Keywords :
S-parameters; antenna theory; loop antennas; microstrip antenna arrays; two-port networks; 3.5 to 4.5 GHz; E-plane coupling coefficient; H-plane coupling coefficient; TM/sub 11/ mode; TM/sub 12/ mode; circular microstrip antennas; circular patch; coaxial probe feed; coupling coefficient; full-wave analysis; microstrip array antenna; mutual coupling; performance; scattering matrix; spherical concentric annular-ring antennas; two-port network; Coaxial components; Current density; Microstrip antenna arrays; Microstrip antennas; Mutual coupling; Patch antennas; Permittivity; Probes; Resonant frequency; Surface impedance;
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.1997.631461
