Ku and Ka dual-band integrated feed source and satellite antenna in satellite communication

The utility model discloses a Ku and Ka dual-band integrated feed source and satellite antenna in satellite communication. The Ku and Ka dual-band integrated feed source and satellite antenna comprises a transmit-receive interface (1), a waveguide converter (2), a Ku duplexer (3), a polarizer (4) and a Ka duplexer (5) which are connected in sequence, the Ku duplexer (3) comprises a through Ku resonant cavity (31) which is arranged in the Ku resonant cavity (31) along the axial direction; a Ku receiving interface (6) is arranged on the side wall of a Ku first-stage transmission resonant cavity (311) of the Ku resonant cavity (31); the side wall of a Ku secondary transmission resonant cavity (312) of the Ku resonant cavity (31) is provided with a Ku transmitting port (7) of the Ku secondary transmission resonant cavity (312), and the Ku resonant cavity (31) further comprises a Ka transition resonant cavity (313); the feed source body is provided with the receiving and transmitting port of the Ku frequency band