Sensor system for metallic targets including doppler radar and radiometer
In a sensor system including Doppler radar, a radiometer and circuits for comparing the target information received by the two devices, a receiving mixer comprising a mixer oscillator is employed both for transmitting the CW Doppler radar emission signal and for transforming the frequency of the returning radar echo and radiometer signal. At the output of the mixer, the Doppler signal is obtained as a low-frequency signal and the radiometer signal as an IF signal, so that both can easily be separated and individually processed. The radiometer signal is checked only for a jump in the noise temperature. With such a jump present and if simultaneously a radar target is detected, the presence of a metallic target is inferred.
- Assignee:
- Licentia Patent Verwaltungs GmbH (Germany, Federal Republic Of)
- Patent Number(s):
- US 4511897
- OSTI ID:
- 5204856
- Country of Publication:
- United States
- Language:
- English
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