A theoretical and experimental study of waveguide coupled SAWresonator filters

摘要

The coupling-of-modes (COM) formalism is extended to includencoupled transducers and applied to the modelling of surface acousticnwave (SAW) coupled resonator filters. The models do not require thenderivation of equivalent circuits and they accommodate fingernreflections, electromagnetic feedthrough and external matching circuits.nFrequency responses for waveguide-coupled devices are computed andncompared to experimental results. Longitudinal mode profiles within thenresonant cavities are presented