Title :
Radiation characteristics of a patch antenna on a thin PBG substrate
Author :
Coccioli, R. ; Deal, W.R. ; Itoh, Takayuki
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A periodically loaded substrate is employed to reduce excitation of surface waves by a patch antenna. The computed dispersion diagram of the substrates shows that surface wave propagation is forbidden along specific directions. By properly orienting the patch antenna on the substrate, this can result in good improvement of antenna performance. In agreement with the expected result, the measured radiation pattern shows a 10 dB reduction in the side lobes associated with power launched from surface waves.
Keywords :
antenna radiation patterns; microstrip antennas; microwave antennas; photonic band gap; surface electromagnetic waves; 10.5 GHz; SHF; antenna performance; dispersion diagram; measured radiation pattern; numerical analysis; patch antenna; periodically loaded substrate; photonic bandgap material; radiation characteristics; side lobes reduction; surface wave propagation; surface waves excitation; thin PBG substrate; Antenna measurements; Antenna radiation patterns; Antennas and propagation; Patch antennas; Power measurement; Surface waves;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1998. IEEE
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-4478-2
DOI :
10.1109/APS.1998.702023
