MICROMINATURE DOWN CONVERTER FOR SATELLITE COMMUNICATIONS

摘要

A microminature down converter for satellite communications has a structure in which high frequency circuit printed boards (5) are respectively arranged on peripheral four surfaces of a box made of a die-casting and a power printed boards (1) for supplying power to each of said high frequency circuit printed boards is disposed on a surface opposite to an input portion of a wave guide tube, whereby power supply to each of the high frequency circuit printed boards (5) is performed not through lead wires. Therefore, electromagnetic couplings occurring between printed boards are prevented and electromagnetic couplings between high frequency signals occurring in the printed boards and lead wires are also prevented, so that it is possible to restrain occurrence of undesired waves.