VSWR detector for a tunable filter structure
AssigneeQorvo US, Inc.
InventorsGeorge Maxim, Dirk Robert Walter Leipold, Baker Scott
Life of this patent
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Abstract
Embodiments of radio frequency (RF) filter front-end circuitry are disclosed that include a tunable RF filter structure having weakly coupled resonators and a Voltage Standing Wave Ratio (VSWR) control circuit. The VSWR control circuit is configured to detect a VSWR at a terminal of the tunable RF filter structure and to dynamically tune the tunable RF filter structure based on the VSWR. In this manner, the VSWR control circuit tunes the tunable RF filter structure to improve performance of tunable RF filter structure over variations in the VSWR.
Claims30
Radio frequency (RF) front-end circuitry comprising:
- a tunable RF filter structure comprising a pair of weakly coupled resonators, wherein the pair of weakly coupled resonators is weakly coupled by having a magnetic coupling coefficient that is less than or equal to approximately 0.3 between each of the pair of weakly coupled resonators;
- and
- a Voltage Standing Wave Ratio (VSWR) control circuit configured to:
- detect a VSWR of the tunable RF filter structure;
- and
- dynamically tune the tunable RF filter structure based on the VSWR of the tunable RF filter structure.
A method, comprising:
- detecting a VSWR of a tunable RF filter structure comprising a pair of weakly coupled resonators, wherein the pair of weakly coupled resonators is weakly coupled by having a magnetic coupling coefficient that is less than or equal to approximately 0.3 between each of the pair of weakly coupled resonators;
- and
- tuning the tunable RF filter structure dynamically based on the VSWR of the tunable RF filter structure.
Dependencies are inferred from the claim text.