Invention Grant
- Patent Title: Weakly coupled based harmonic rejection filter for feedback linearization power amplifier
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Application No.: US14215800Application Date: 2014-03-17
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Publication No.: US09966905B2Publication Date: 2018-05-08
- Inventor: Dirk Robert Walter Leipold , George Maxim , Baker Scott , Danny W. Chang
- Applicant: RF Micro Devices, Inc.
- Applicant Address: US NC Greensboro
- Assignee: Qorvo US, Inc.
- Current Assignee: Qorvo US, Inc.
- Current Assignee Address: US NC Greensboro
- Agency: Withrow & Terranova, P.L.L.C.
- Main IPC: H01F27/28
- IPC: H01F27/28 ; H03F1/32 ; H03F3/195 ; H03F3/21 ; H03F3/19 ; H03F3/213 ; H01F27/38 ; H03H7/09 ; H03H7/01 ; H03F1/34 ; H03F1/22

Abstract:
Radio frequency (RF) filters configured to filter undesired signal components (e.g., noise and harmonics) from RF signals are disclosed. In one embodiment, an RF filter includes a first inductor coil having a first winding and a second inductor coil having a second winding and a third winding. The second winding of the second inductor coil is configured to have a first mutual magnetic coupling with the first winding, while the third winding of the second inductor coil is configured to have a second mutual magnetic coupling with the first winding. 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. In this manner, the first inductor coil and the second inductor coil may be provided in a compact arrangement while providing weak mutual magnetic coupling between the first inductor coil and the second inductor coil.
Public/Granted literature
- US20140266531A1 WEAKLY COUPLED BASED HARMONIC REJECTION FILTER FOR FEEDBACK LINEARIZATION POWER AMPLIFIER Public/Granted day:2014-09-18
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