Title :
Resonance frequency of a superstrate-loaded spherical annular-ring microstrip patch
Author :
Horng-Dean Chen ; Hong-Twu Chen ; Kin-Lu Wong
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
The resonant frequency of a microstrip patch antenna is a very important factor to be determined in microstrip antenna designs. It is also known that the resonant frequency is sensitive to the superstate loading and the curvature variation of the microstrip antenna. The resonance problem of superstrate-loaded conformal microstrip antennas with rectangular or circular patches have also been treated previously. In the present article, the resonance problem of a superstrate-loaded annular microstrip patch on a spherical body is studied. A full-wave analysis and a moment method calculation are used to solve the complex resonant frequency of the microstrip patch. Typical numerical results of the resonant frequency and the quality factor at the TM/sub 12/ mode, obtained from the real and imaginary parts of complex resonant frequency, are presented and analyzed.<>
Keywords :
Q-factor; antenna theory; loop antennas; method of moments; microstrip antennas; TM/sub 12/ mode; antenna designs; curvature variation; full-wave analysis; microstrip patch antenna; moment method; quality factor; resonant frequency; superstrate-loaded spherical annular-ring microstrip patch; Current density; Dielectric losses; Geometry; Loaded antennas; Microstrip antennas; Patch antennas; Permittivity; Q factor; Resonance; Resonant frequency;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1994. AP-S. Digest
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-2009-3
DOI :
10.1109/APS.1994.407779
