RF FILTER STRUCTURE FOR ANTENNA DIVERSITY AND BEAM FORMING
First Claim
1. Radio frequency (RF) front-end circuitry, comprising:
- an RF filter structure comprising;
a plurality of resonators;
a first tunable RF filter path defined by a first set of the plurality of resonators such that the first tunable RF filter path has a first amplitude and a first phase;
a second tunable RF filter path defined by a second set of the plurality of resonators such that the second tunable RF filter path has a second amplitude and a second phase; and
control circuitry configured to set a first amplitude difference between the first amplitude and the second amplitude to approximately a first target amplitude difference and set a first phase difference between the first phase and the second phase to approximately a first target phase difference.
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Abstract
Radio frequency (RF) front-end circuitry that includes control circuitry and an RF filter structure that includes a plurality of resonators are disclosed. In one embodiment, a first tunable RF filter path is defined by a first set of the plurality of resonators such that the first tunable RF filter path has a first amplitude and a first phase. A second tunable RF filter path is defined by a second set of the plurality of resonators such that the second tunable RF filter path has a second amplitude and a second phase. To provide antenna diversity and/or beam forming/beam steering, the control circuitry is configured to set a first amplitude difference between the first amplitude and the second amplitude to approximately a first target amplitude difference and set a first phase difference between the first phase and the second phase to approximately a first target phase difference.
13 Citations
30 Claims
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1. Radio frequency (RF) front-end circuitry, comprising:
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an RF filter structure comprising; a plurality of resonators; a first tunable RF filter path defined by a first set of the plurality of resonators such that the first tunable RF filter path has a first amplitude and a first phase; a second tunable RF filter path defined by a second set of the plurality of resonators such that the second tunable RF filter path has a second amplitude and a second phase; and control circuitry configured to set a first amplitude difference between the first amplitude and the second amplitude to approximately a first target amplitude difference and set a first phase difference between the first phase and the second phase to approximately a first target phase difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification