Title :
Analysis of the disk-loaded spherical annular-ring microstrip antenna
Author :
Hong-Twu Chen ; Yuan-Tung Cheng
Author_Institution :
Dept. of Electr. Eng., Chinese Mil. Acad., Fong-Shan, Taiwan
Abstract :
It has been found that, by combining several patches with similar resonant frequencies on the same or different layers of the microstrip structure, the antenna bandwidth can be broadened. The disk-loaded spherical annular-ring microstrip antenna is analysed using a full-wave analysis and a moment-method calculation. The antenna is excited by a coaxial probe. Numerical results of the input impedance and voltage standing wave ratio (VSWR) are presented. The related numerical results of the single patch case are plotted for comparison. The radiated fields and the cross-polarization characteristics are also calculated and discussed.
Keywords :
antenna radiation patterns; electric impedance; electromagnetic wave polarisation; loop antennas; method of moments; microstrip antennas; VSWR; antenna bandwidth; coaxial probe; cross polarization characteristics; disk loaded microstrip antenna; full wave analysis; input impedance; microstrip structure; moment method; numerical results; radiated fields; resonant frequencies; spherical annular ring microstrip antenna; voltage standing wave ratio; Antenna theory; Bandwidth; Coaxial components; Current density; Impedance; Microstrip antennas; Permittivity; Probes; Resonance; Resonant frequency;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549690
