METHODS AND APPARATUS FOR PHASE CHANGE DETECTION USING A RESONATOR
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United States of America Patent
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Nov 16, 2023
app pub date -
Jul 26, 2023
filing date -
Jul 26, 2023
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Abstract
Disclosed is a microwave cavity resonator used as a phase change (phase modulation) to intensity change (intensity or amplitude modulation) converter. Certain aspects and embodiments include resonant circuits, such as a resistor, inductor and capacitor (RLC) circuit. Certain aspects and embodiments convert changes in phase to changes in output voltage to perform analog demodulation of a phase modulated microwave carrier. Certain aspects and embodiments use resonance when the reactive components of the circuit (capacitive and inductive components) are equal in magnitude and 180 degrees out of phase with one another, thereby cancelling out the reactance component of the circuit’s impedance.
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