A method for designing the variable-way high-power cavity combiner

Abstract

The cavity combiner was put forward for high power combining due to its advantages of larger combining ability, variable input ways and less power loss. For the high power cavity combiner, it is better to keep the power loss ratio in a reasonable range, because much power loss would lead to strict requirements on cooling system. The combiner with variable input ways is convenient for outputting different powers according to practical demands. In this paper, a method for designing a variable-way high-power cavity combiner was proposed, based on the relation between input and output coupling coefficients obtained by analyzing the equivalent circuit of the cavity combiner. The method can make the designed cavity combiner in a matching state and its power loss rate in a reasonable range as the number of input ways changes. As an illustrating example, a cavity combiner with 500 MHz and variable input ways from 16 to 64 is designed, and the simulation results show that our proposed method is feasible.