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This paper introduces dual-mode bandpass filter with cross couplings and absorbing resonators. The responses of six electrical resonators & two absorbing resonators and eight electrical resonators are simulated. It is shown that the cross coupling and absorbing resonator can improve the cutoffs at the edge of the passband evidently. An L-band filter composed of three physical cylindrical waveguide cavities and one absorbing cavity was made and tuned. The experimental result is in good agreement with the simulation.

A novel high-power combiner/divider with compensation circuit is presented in this paper. The isolating resistor between two dividing ports in conventional Wilkinson power divider is replaced by a structure of coax balun transformer. With this coaxial structure, the bandwidth of this novel combiner is three times wider than a conventional one. It can be used in broadband and high-power combination. Simulation results of the conventional Wilkinson combiner, a bisection combiner and the novel combiner are given and compared in this paper.