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Weakly coupled based harmonic rejection filter for feedback linearization power amplifier

  • US 10,320,339 B2
  • Filed: 05/07/2018
  • Issued: 06/11/2019
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A radio frequency (RF) filter comprising:

  • a first inductor coil having a first winding;

    a second inductor coil having a second winding, a third winding, a fourth winding, and a fifth winding, wherein;

    the second winding is configured to have a first mutual magnetic coupling with the first winding of the first inductor coil;

    the third winding is configured to have a second mutual magnetic coupling with the first winding of the first inductor coil; and

    the second winding is connected to the third winding such that the first mutual magnetic coupling and the second mutual magnetic coupling are in opposition.

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