Short-range radar transceiver employing a FET oscillator
First Claim
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1. A short-range radar transceiver operable over a range in which the sideband noise doe snot obscure the intermediate frequency signal, comprising:
- field effect transistor oscillator means for generating at time varying signal;
antenna means for transmitting signals to a target and for receiving signals reflected from a target;
means for coupling said time varying signal to said antenna means to be transmitted therefrom;
a balanced mixer having a first port for receiving said time varying signal and a second port for receiving signals from said antenna means and functioning as an AM noise suppressor, for producing an intermediate frequency signal; and
signal processing means responsive to said intermediate frequency signal for producing indications of the range and/or the rate of change of said range of said target.
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Abstract
A field effect transistor FMCW radar transceiver for short-range target detection, employs a varactor-tuned, gallium arsenide field effect transistor, voltage-controlled oscillator in the dual role of the transmitter signal source and the local oscillator. The radar transceiver is capable of operating at low IF frequencies for short range, which can be less than 30 feet, target detection.
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Citations
14 Claims
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1. A short-range radar transceiver operable over a range in which the sideband noise doe snot obscure the intermediate frequency signal, comprising:
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field effect transistor oscillator means for generating at time varying signal; antenna means for transmitting signals to a target and for receiving signals reflected from a target; means for coupling said time varying signal to said antenna means to be transmitted therefrom; a balanced mixer having a first port for receiving said time varying signal and a second port for receiving signals from said antenna means and functioning as an AM noise suppressor, for producing an intermediate frequency signal; and signal processing means responsive to said intermediate frequency signal for producing indications of the range and/or the rate of change of said range of said target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification