Title :
Power conservation for reflector antennas with truncated feed patterns
Author :
Rusch, W.V.T. ; Cramer, P.
Author_Institution :
University of Southern California, Department of Electrical Engineering, Los Angeles, USA
Abstract :
Reflector-antenna calculations using idealised truncated feed patterns can lead to incorrect values of total secondary radiated power. It is demonstrated that this discrepancy is due to the presence of higher-order spherical modes incident on the reflector. When a proper spherical-wave expansion of the incident field is used, in conjunction with the physical-optics technique, to determine the scattered field, the total power of the scattered field will equal the power radiated by the feed.
Keywords :
antenna radiation patterns; antenna theory; reflector antennas; incident field; power conservation; reflector antennas; scattered field; spherical modes; spherical wave expansion; total secondary radiated power; truncated feed patterns;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19760103
