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RADIO FREQUENCY FILTERING CIRCUITRY WITH RESONATORS

  • US 20160126929A1
  • Filed: 11/03/2015
  • Published: 05/05/2016
  • Est. Priority Date: 11/03/2014
  • Status: Active Grant
First Claim
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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%.

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