Patent ID: 9698751
Date: 2017-07-04
CPC Classifications: H01F,H03H

Claim:
1. Radio frequency (RF) multiplexer circuitry comprising: a first signal path between a first intermediate node and a common node; a second signal path between a second intermediate node and the common node; first resonator circuitry connected between the first signal path and ground and configured to allow signals within a first frequency pass band to pass between the first intermediate node and the common node while attenuating signals outside of the first frequency pass band, the first resonator circuitry comprising a first LC resonator and a second LC resonator that is electromagnetically coupled with the first LC resonator such that a coupling factor between the first LC resonator and the second LC resonator is between about 1.0% and 40.0%; and second resonator circuitry connected between the second signal path and ground and configured to allow signals within a second frequency pass band to pass between the second intermediate node and the common node while attenuating signals outside of the second frequency pass band, the second resonator circuitry comprising a third LC resonator and a fourth LC resonator that is electromagnetically coupled with the third LC resonator such that a coupling factor between the third LC resonator and the fourth LC resonator is between about 1.0% and 40.0%.