Doppler radar module using micro-stripline technology
First Claim
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1. A Doppler radar module for forming Doppler signals from reflections from an object, comprising:
- a housing of electrically conductive material;
a dielectric resonator mounted in said housing;
a local oscillator connected to said dielectric resonator, said dielectric resonator stabilizing an oscillator signal from said local oscillator;
a mixer connected to an output of said local oscillator to receive said oscillator signal;
a mismatch circuit connected between said mixer and said local oscillator;
a microwave antenna connected in series with said mixer to receive said oscillator signal from said output of said local oscillator via said mixer so that a transmission signal is emitted from said microwave antenna, said microwave antenna receiving reflections of said transmission signal from the object and connected to transmit received signals to said mixer; and
an antenna matching circuit connected between said mixer and said antenna;
wherein said mixer is connected to mix part of said oscillator signal from said local oscillator with the received signal to form a Doppler signal.
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Abstract
A Doppler radar module constructed using micro-stripline technology is used in motion sensors and includes a local oscillator stabilized with a dielectric resonator that feeds a microwave antenna via a mixer that is connected in series. The transmission signal is emitted from the microwave antenna and is reflected back from an object where it is received by the antenna and forwarded to the mixer. The mixer mixes the reflected signal with a portion of the oscillator signal to form a Doppler signal.
23 Citations
12 Claims
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1. A Doppler radar module for forming Doppler signals from reflections from an object, comprising:
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a housing of electrically conductive material; a dielectric resonator mounted in said housing; a local oscillator connected to said dielectric resonator, said dielectric resonator stabilizing an oscillator signal from said local oscillator; a mixer connected to an output of said local oscillator to receive said oscillator signal; a mismatch circuit connected between said mixer and said local oscillator; a microwave antenna connected in series with said mixer to receive said oscillator signal from said output of said local oscillator via said mixer so that a transmission signal is emitted from said microwave antenna, said microwave antenna receiving reflections of said transmission signal from the object and connected to transmit received signals to said mixer; and an antenna matching circuit connected between said mixer and said antenna; wherein said mixer is connected to mix part of said oscillator signal from said local oscillator with the received signal to form a Doppler signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification