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US 10,270,480 B1Granted
Signal-tracking RF bandstop filter
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsAndrew C. Guyette, Eric J. Naglich
Life of this patent
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Abstract
Systems and methods are provided for implementing bandstop filters (e.g., RF/microwave bandstop filters) that can automatically tune to a frequency of an interfering signal. Embodiments of the present disclosure provide automatically tunable signal-tracking bandstop filters with a significant reduction in response time, complexity, size, weight, and cost when compared to conventional devices.
Claims20
A bandstop filter, comprising:
- a first resonator, coupled to a first detector;
- a second resonator, coupled to the first resonator, wherein the second resonator is coupled to a second detector;
- and
- a control circuit, coupled to the first detector and the second detector, configured to tune the first resonator and the second resonator in response to detecting a first change in a first voltage at the first detector or a second change in a second voltage at the second detector.
1 more element
A bandstop filter, comprising:
- a first resonator, coupled to a first detector;
- and
- a second resonator, coupled to a second detector, wherein the first detector and the second detector are configured such that a first voltage at the first detector is equal to a second voltage at the second detector when a frequency of an interfering signal is equal to a desired bandstop center frequency of the bandstop filter.
A bandstop filter, comprising:
- a first resonator, weakly coupled to a first detector diode;
- a second resonator, coupled to the first resonator, wherein the second resonator is weakly coupled to a second detector diode;
- a comparator, coupled to the first detector diode and the second detector diode;
- an integrator, coupled to an output of the comparator;
- and
- a tuner, coupled to an output of the integrator, wherein the tuner is configured to tune the first resonator and the second resonator.
3 more elements
Dependencies are inferred from the claim text.