Synthesis of non-contiguous diplexers using broadband matching theory

Describes an approximate but very accurate analytical method based on the theory of broadband matching. Each filter is designed as a broadband matching network over its respective low or high passband, with the immittance of the other filter representing the load network to be matched. It is found that excellent results are obtained when only the first element of the 'other' filter is taken into account in the load network. Good results almost to fully contiguous operation are obtained for high-degree Chebyshev lowpass/highpass diplexers.<>