Filter That Comprises Bulk Acoustic Wave Resonators And That Can Be Operated Symmetrically On Both Ends

摘要

A filter for use with bulk acoustic waves includes an input port and an output port. The input port and the output port are symmetrically operable. Signal paths extend from a terminal of the input port to a terminal of the output port. Bulk acoustic wave resonators are in the signal pats. The bulk acoustic wave resonators are arranged symmetrically in the signal paths. A complex impedance associated with each signal path is provided for electrically matching to a corresponding connection.