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Weakly coupled based harmonic rejection filter for feedback linearization power amplifier

  • US 9,966,905 B2
  • Filed: 03/17/2014
  • Issued: 05/08/2018
  • 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 and configured to;

    have a mutual electric coupling with a second inductor coil and generate an electric flux in response to an RF signal, such that the electric flux substantially transfers the RF signal to the second inductor coil; and

    the second inductor coil having a second winding and a third 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 to substantially cancel an aggregate mutual magnetic coupling between the first inductor coil and the second inductor coil.

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