Filtering characteristic adjustments of weakly coupled tunable rf filters
AssigneeRF Micro Devices, Inc.
InventorsGeorge Maxim, Baker Scott, Dirk Robert Walter Leipold
Life of this patent
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Abstract
RF communications circuitry, which includes a first RF filter structure and RF detection circuitry, is disclosed. The first RF filter structure includes a first group of RF resonators, which include a first pair of weakly coupled RF resonators coupled to a signal path of a first RF signal. One of the first group of RF resonators provides a first sampled RF signal. The RF detection circuitry detects the first sampled RF signal to provide a first detected signal. The first RF filter structure adjusts a first filtering characteristic of the first RF filter structure based on the first detected signal.
Claims30
An apparatus comprising:
- a first RF filter structure comprising a first plurality of RF resonators and configured to adjust a first filtering characteristic of the first RF filter structure based on a first detected signal, wherein:
- the first plurality of RF resonators comprises a first pair of weakly coupled RF resonators, such that the first pair of weakly coupled RF resonators is coupled to a signal path of a first RF signal;
- and
- one of the first plurality of RF resonators is configured to provide a first sampled RF signal;
- and
- RF detection circuitry configured to detect the first sampled RF signal to provide the first detected signal.
Dependencies are inferred from the claim text.