Tunable RF filter paths for tunable RF filter structures
First Claim
1. A radio frequency (RF) filter structure comprising:
- a first resonator comprising;
a first inductor; and
a first capacitive structure electrically connected to the first inductor;
a second resonator operably associated with the first resonator such that an energy transfer factor between the first resonator and the second resonator is less than 10%, wherein the second resonator comprises;
a second inductor having a maximum lateral width and wherein a displacement between the first inductor and the second inductor is less than or equal to half the maximum lateral width;
a second capacitive structure electrically connected to the second inductor;
a first cross-coupling capacitive structure electrically connected between the first resonator and the second resonator; and
a second cross-coupling capacitive structure electrically connected between the first resonator and the second resonator, wherein;
the first cross-coupling capacitive structure is electrically connected between the first resonator and the second resonator so as to provide a positive coupling coefficient between the first resonator and the second resonator; and
the second cross-coupling capacitive structure is electrically connected between the first resonator and the second resonator so as to provide a negative coupling coefficient between the first resonator and the second resonator.
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Accused Products
Abstract
This disclosure relates generally to radio frequency (RF) filter structures. In one embodiment, an RF filter structure includes a first resonator and a second resonator. The second resonator is operably associated with the first resonator such that an energy transfer factor between the first resonator and the second resonator is less than 10%. The first resonator includes a first inductor and a first capacitive structure electrically connected to the first inductor, while the second resonator has a second inductor and a second capacitive structure electrically connected to the second inductor. A displacement between the first inductor and the second inductor is less than or equal to half a maximum lateral width of the second inductor. To set an electric coupling coefficient, a first cross-coupling capacitive structure is electrically connected between the first resonator and the second resonator.
98 Citations
27 Claims
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1. A radio frequency (RF) filter structure comprising:
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a first resonator comprising; a first inductor; and a first capacitive structure electrically connected to the first inductor; a second resonator operably associated with the first resonator such that an energy transfer factor between the first resonator and the second resonator is less than 10%, wherein the second resonator comprises; a second inductor having a maximum lateral width and wherein a displacement between the first inductor and the second inductor is less than or equal to half the maximum lateral width; a second capacitive structure electrically connected to the second inductor; a first cross-coupling capacitive structure electrically connected between the first resonator and the second resonator; and a second cross-coupling capacitive structure electrically connected between the first resonator and the second resonator, wherein; the first cross-coupling capacitive structure is electrically connected between the first resonator and the second resonator so as to provide a positive coupling coefficient between the first resonator and the second resonator; and the second cross-coupling capacitive structure is electrically connected between the first resonator and the second resonator so as to provide a negative coupling coefficient between the first resonator and the second resonator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A radio frequency (RF) filter structure comprising:
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a first resonator comprising; a first inductor; and a first capacitive structure electrically connected to the first inductor; a second resonator operably associated with the first resonator such that an energy transfer factor between the first resonator and the second resonator is less than 10%, wherein the second resonator comprises; a second inductor having a maximum lateral width and wherein a displacement between the first inductor and the second inductor is less than or equal to half the maximum lateral width; and a second capacitive structure electrically connected to the second inductor; a first cross-coupling capacitive structure electrically connected between the first resonator and the second resonator; and a second cross-coupling capacitive structure, wherein the first cross-coupling capacitive structure and the second cross-coupling capacitive structure are arranged to form a first capacitive voltage divider. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification