The invention provides a multi-beam load front-end architecture of a mobile communication
satellite. The multi-beam load front-end architecture comprises a forward beam forming network BFN, three transition networks, a multi-port
amplifier array, a
duplexer array, a feed source array, and a reflector. A
signal, which enters into a beam, is subjected to power allocating,
amplitude weighting and phase weighting through the forward beam forming network. The
signal is amplified by a multi-port
amplifier. The transmit-receive sharing of a feed source is realized by a
duplexer. The feed source array outputs a
signal to irradiate a reflective surface, so that the
radiation of a
radio frequency signal is realized. A
transition network 1 is connected with a BFN output port and an input port of a MPA. A transition matrix 2 is connected with the output port of the MPA and a
duplexer in the duplexer array. A
transition network 3 is connected with the duplexer in the duplexer array and a feed source. According to the technical scheme of the invention, the multi-beam load of the mobile communication
satellite is low in feeder loss and weight, and good in service centralization capability.