A novel two-way TM01 mode combiner for high power microwave applications
In this paper, we propose a novel two-way coherent TM01 mode combiner that combines the two-way TM01 mode to a one-way TM01 mode with high power capacity and combining efficiency. It is mainly composed of two two-way TM01 mode to TE10 mode power dividers, one four-way TE10 mode to TM01 mode power combiner and four H-plane bend rectangular waveguides. Simulation shows that, at center frequency 9.3 GHz, the isolation between two input ports is -19 dB, return loss for the input port the output ports is -22 dB and -26 dB respectively, the insertion loss is less than -0.1 dB. From 9.1 to 9.5 GHz, the isolation and single port return loss are both better than -10 dB, and the insertion loss is better than -0.3 dB. Its power capacity can be predicted to be approximately 5GW with the breakdown threshold 100 MV/m. The novel TM01 mode combiner has the merits of high power capacity and low insertion loss and high isolation between the input ports. Further experiments will be carried out to verify the simulations.