Weakly coupled based harmonic rejection filter for feedback linearization power amplifier
First Claim
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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Accused Products
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.
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Citations
19 Claims
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1. A radio frequency (RF) filter comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification