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Abstract

A signal repeater assembly (1) for a spacecraft, includes a channel selectivity network (CSN) (2) having a plurality of first input ports (4-13) connected by selectively operable filter circuits (14-23) to a plurality of first output ports (24-31) to enable a signal at any selected first input port (4-13) to be passed to any selected first output port (24-31). The CSN (2) is connected to a shared power amplification module (SPAM) (3) having a plurality of second input ports (44-51) for receiving signals from the first output ports (24-31), a plurality of second output ports (52-59) and a network (60) of balanced amplifier devices (61) operable to couple the second input ports (44-51) to the second output ports (52-59) so that any amplification of a signal received at any one of the second input ports (44-51) is shared by all the amplifier devices (61) to allow the total available amplification power to be used by any one or a combination of second output ports (52-59).

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