I. Naito et al., SINGLE-REFLECTOR-TYPE WIDE BEAM-SPACING MULTIBEAM ANTENNAS, Electronics & communications in Japan. Part 1, Communications, 78(6), 1995, pp. 68-81
Japanese commercial communications satellites (CSs), which are 50 to 6
0 degrees from the Japanese broadcasting satellite (BS), have begun di
rect broadcasting service, Simultaneous reception of broadcasting from
CSs and BS requires a multibeam antenna with wide beam-spacing. An op
timum reflector for a single-reflector-type wide beam-spacing multibea
m antenna is presented on the basis of wave aberration analysis of def
ocus-fed reflector without restrictions on reflector symmetry and feed
displacement amount.