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US 10,965,258 B2Granted
Weakly coupled tunable RF receiver architecture
AssigneeQorvo US, Inc.
InventorsGeorge Maxim, Dirk Robert Walter Leipold, Baker Scott
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Abstract
RF communications circuitry, which includes a first tunable RF filter and a first RF low noise amplifier (LNA) is disclosed. The first tunable RF filter includes a pair of weakly coupled resonators, and receives and filters a first upstream RF signal to provide a first filtered RF signal. The first RF LNA is coupled to the first tunable RF filter, and receives and amplifies an RF input signal to provide an RF output signal.
Claims20
An apparatus comprising:
- a first tunable radio frequency (RF) filter configured to receive and filter a first upstream RF signal to provide a first filtered RF signal, the first tunable RF filter comprising:
- a first resonator magnetically coupled to a second resonator;
- a first cross-coupling capacitive structure configured to provide a variable positive electric coupling coefficient between the first resonator and the second resonator;
- and
- a second cross-coupling capacitive structure configured to provide a variable negative electric coupling coefficient between the first resonator and the second resonator;
- wherein a first filter parameter of the first tunable RF filter is tunable in response to a first filter control signal which electrically adjusts the variable positive electric coupling coefficient and the variable negative electric coupling coefficient;
- a first RF low noise amplifier (LNA) coupled to the first tunable RF filter and configured to receive and amplify a first RF input signal to provide a first RF output signal;
- and
- RF system control circuitry configured to construct a measurement-based RF spectrum profile and provide the first filter control signal based on the measurement-based RF spectrum profile.
6 more elements
Dependencies are inferred from the claim text.