Resonator circuit with a widened degrees of freedom, filter having an improved ability to adjust and duplexer with improved ability to adjust

摘要

It is a resonator circuit (rs) is provided with new degrees of. The resonator circuit comprises a resonator, an impedance circuit and a z - transformer therebetween. The resonator circuit can be, for example, in a hf - filter and / or in a duplexer can be used.