Exact Design of Wideband Equal-Ripple Bandpass Filters with Non-Adjacent Resonator Couplings

An exact synthesis procedure for equal-ripple bandpass filters with arbitrary amplitude and delay response valid for all bandwidths is presented. The filters are realizable in the form of a multiresonator filter with couplings between non-adjacent resonators. Design constraints imposed by the use of "simple" coupling elements are described and illustrated.