A New Class of Reconfigurable Microwave Bandpass Filters

A distributed network prototype is presented that enables the design of a new class of reconfigurable bandpass filters. The design procedure is based on the application of a classical synthesis technique. The passband of the filters are reconfigured by simply open or short circuiting the ends of its resonators. The filters exhibit constant bandwidth and passband shape as they are reconfigured. The performance of implemented filters agrees with the presented theory.