Title :
Filtering secondary mirror for a dual-band Cassegrain reflector antenna
Author :
Langley, Richard J. ; Parker, Edward A.
Author_Institution :
University of Kent at Canterbury, Electronics Laboratories, Canterbury, UK
Abstract :
A dual-frequency Cassegrain reflector antenna has been investigated in which the secondary mirror is constructed from a stack of waveguides. The secondary mirror behaves as a highpass filter, giving access to the prime-focus feed position at the higher-frequency band. The copolar and crosspolar radiation patterns are discussed.
Keywords :
antenna accessories; antenna radiation patterns; filters; reflector antennas; copolar radiation patterns; crosspolar radiation patterns; dual band Cassegrain reflector antenna; highpass filter; prime focus feed position; secondary mirror;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19760281
