Cylindrical cavity microwave power combiner with microstrip line inputs and rectangular waveguide output

A compact microwave power combiner for combining output from six solid-state power amplifiers is studied. The combiner consists of 6 standard microstrip line inputs from high power amplifier, resonant cylindrical cavity and one standard rectangular waveguide output. The effect of input power amplifier failure is also studied and simulation results are described. Insertion loss of less than 0.3 dB over 200 MHz bandwidth in X-Band is simulated.