HIGH FREQUENCY SWITCH MATRIX

PROBLEM TO BE SOLVED: To obtain a high frequency switch matrix provided with a sure recovering means even at the time of the fault of a switch element in an on- state. SOLUTION: High frequency amplifiers 64-69 connected to same output hybrids 52-54 are used by permitting one of them to be active and the high frequency amplifier 64 connected to an output synthesizer 12, for example, to which at least one of the switch elements, for example, 1-1 to 4-1 is made to be non-operated when the switch element is faulty. Thus, disconnection is executed from a main switch matrix system, a control signal is changed-over into the amplifier 65, for example, at the other output side and a switch element group which is related to the output amplifier 65, for example, of a matrix switch group 101 and, then, the function of the system is recovered.