Communications: directive radio wave systems and devices (e.g. – Presence detection only – By motion detection
Patent
1982-12-28
1990-11-13
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Presence detection only
By motion detection
340552, G01S 1356, G08B 1324
Patent
active
049705172
ABSTRACT:
A microwave horn having a narrow radiation beam characteristic is energized by a Gunn oscillator coupled to a driver/detector that turns the Gunn oscillator on for a small fraction of a period to produce a sequence of detected pulses representative of an item being sensed that is amplified by an A.C. amplifier and filtered with gain controlled by a sensitivity potentiometer that energizes a threshold detector to produce threshold pulses that trigger hold-off circuitry to produce an output pulse when the threshold pulse is outside the duration of the output pulse. A hold-off potentiometer controls the duration of each output pulse. An output driver amplifies the output pulse and delivers it to an output terminal.
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Alpha Industries Inc.
Barron Jr. Gilberto
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