Title :
Aperture field integration method applied to on-board array-fed reflector antenna for DBS
Author :
Yamada, Tetsuya ; Tanaka, Shoji ; Nakagawa, Hitoshi ; Kawaguchi, Yutaka ; Murata, Takao ; Nomoto, Toshihiro
Author_Institution :
NHK Sci. & Tech. Res. Labs., Tokyo, Japan
Abstract :
The attenuation value of broadcasting satellite signals due to heavy rain is discussed and antennas by which the radiation pattern can be adaptively varied according to the shape of rainfall and the attenuation level are considered to be necessary. We examine array-fed reflector antennas, which increase the EIRP in rainfall areas to compensate for the rainfall attenuation. To synthesise the radiation pattern, we use the aperture field integration method (AFIM), which was usually applied to on-focused reflector antennas. The AFIM is applied to defocused reflector antennas and confirmed its validity
Keywords :
antenna phased arrays; antenna radiation patterns; direct broadcasting by satellite; rain; reflector antenna feeds; reflector antennas; satellite antennas; 21 GHz; DBS; EIRP; aperture field integration method; broadcasting satellite signals; defocused reflector antennas; direct broadcasting satellite; far-field patterns; heavy rain; on-board array-fed reflector antenna; on-board phased-array antenna; radiation pattern; rainfall attenuation; satellite broadcasting; Adaptive arrays; Antenna arrays; Antenna radiation patterns; Apertures; Attenuation; Rain; Reflector antennas; Satellite antennas; Satellite broadcasting; Shape;
Conference_Titel :
Radio and Wireless Conference, 2001. RAWCON 2001. IEEE
Conference_Location :
Waltham, MA
Print_ISBN :
0-7803-7189-5
DOI :
10.1109/RAWCON.2001.947590
