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US 5,784,021 AGranted
Noiseless radar detector
AssigneeCobra Electronics Corporation
InventorDavid C. Oliva
Life of this patent
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Abstract
A noiseless radar detector with a dielectric resonator to suppress stray electromagnetic radiation generated by a local oscillator within the radar detector is disclosed. The dielectric resonator acts as an RF microwave absorber/attenuator if the resonant frequency of the dielectric resonator corresponds to the frequency of the interference from the local oscillator.
Claims12
A radar detector, comprising:
- receiving means for receiving a modulated microwave signal;
- demodulating means for demodulating a desired mixing carrier wave from the microwave signal, wherein said demodulating means comprises:
- a local oscillator oscillating at a frequency corresponding to the carrier wave;
- and
- a mixing diode to subtract or add the carrier wave from or to the microwave signal;
- and
- a dielectric resonator detached from said demodulating means having a resonant frequency corresponding to the carrier wave to suppress the carrier wave after the carrier wave is demodulated from the microwave signal.
4 more elements
A radar detector, comprising:
- receiving means for receiving a modulated microwave signal;
- demodulating means for demodulating a desired mixing carrier wave from the microwave signal, wherein said demodulating means comprises:
- a local oscillator oscillating at a frequency corresponding to the carrier wave, wherein said local oscillator generates an interference signal;
- and
- a mixing diode to subtract or add the carrier wave from or to the microwave signal;
- and
- a first dielectric resonator detached from said demodulating means having a resonant frequency corresponding to the interference signal to suppress the interference signal.
4 more elements
Dependencies are inferred from the claim text.