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US 10,756,692 B2Granted
Frequency selective canceler
AssigneeMetamagnetics, Inc.
InventorScott M. Gillette
Life of this patent
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Abstract
Described is a frequency selective canceler, which uses signals reflected from a reflective element (e.g. a frequency selective limiter) to selectively reject only signals having a power level above a threshold power level while simultaneously allowing signals having a power level below the threshold power level to pass without rejection.
Claims20
A frequency selective canceler comprising:
- a circulator having a first port coupled to an input of the frequency selective canceler;
- a direct path coupled to a second port of the circulator;
- a conditioning path coupled to a third port of said circulator;
- wherein said direct path comprises a frequency selective limiter (FSL) to allow for transmission of below-threshold signals and redirection of above-threshold signals such that above-threshold signals are reflected off the FSL and routed, using the circulator, through the conditioning path wherein the conditioning path comprises a tunable phase shifter to set the reflected signal at 180 degrees phase shifted as the signal in the direct path;
- and
- a combiner having a first input coupled to the direct path and a second input coupled to the conditioning path.
3 more elements
A frequency selective canceler having an input and an output, the frequency selective canceler comprising:
- a circulator;
- a magnetostatic wave frequency selective limiter (MSW FSL);
- an attenuator disposed in a direct path of the canceler to allow for transmission of below-threshold signals and redirection of above-threshold signals such that above-threshold signals are reflected off the MSW FSL and routed, using said circulator, through a conditioning path
- wherein said conditioning path comprises a phase shifter such that in response to signals provided thereto, said phase shifter sets the phase of a reflected signal provided thereto at a predetermined phase relative to a signal in the direct path;
- where said attenuator is disposed in the direct path and is configured to adjust the amplitudes of signals in both the direct and the conditioning paths;
- and
- a combiner component configured to combine signals from the direct path with signals from said conditioning path such that a rejection of only above-threshold signals occurs while simultaneously allowing below-threshold signals to pass with minimal attenuation between the input and output of the frequency selective canceler.
4 more elements
Dependencies are inferred from the claim text.