Patent ID: 6377136
Filing Date: 2002-04-23
Classification: H03H

Abstract:
A thin film resonator (TFR) filter, comprising:a plurality of TFR components forming a plurality of series and shunt branches between an input port and an output port, wherein each of said plurality of TFR components has a set of resonant frequencies, wherein a resonant frequency set composed of a resonant pole frequency and a resonant zero frequency of at least one TFR component in at least one of said series or shunt branches is different from resonant frequency sets of the other corresponding series and shunt branch TFR components in the filter, and wherein the TFR filter is configured to achieve a uniform response in the passband and wider bandwidth for a given amount of return loss by shifting the resonant frequency set of said at least one TFR component in said at least one said series or shunt branches at time of manufacture of the TFR filter.