Novel Ultra-Wideband Multi-Way Power Combiner

A novel ultra-wideband multi-way coaxial power combiner is presented in this paper. In the new structure, there is a long coaxial transformation cavity, where the microwave signal can be transmitted smoothly with little reflection. For 1GHz-8GHz ultra-wideband application, we've designed a short-circuit resonant cavity to accomplish balanced impedance matching. Simulation and measured results well agree with each other, showing that the insertion loss S21 is about -1dB and the return loss is below -15dB, which is practically feasible for ultrawideband power combining.