Insertion Loss of 4-Level Phase Switch (Short Papers)

A 4-level phase switch using two switching diodes and one circulator is investigated and compared to a switch using two circulators. The results are as follows. 1) If one uses a Iossless combining network for the two diodes, it is impossible to make the losses equal in all four switching states. 2) One can balance the losses by introducing a lossy element into the circuit. The loss of this circuit is given as a function of diode Q