G - Physics – 08 – B
Patent
G - Physics
08
B
343/49
G08B 13/22 (2006.01) G01S 13/56 (2006.01)
Patent
CA 1090452
ABSTRACT OF THE DISCLOSURE A homodyne type radar using the Doppler effect, working by pulses, linked in order to watch over premises to an alarm device triggered in case of an intrusion in this premises, the output circuit of the pulse generator of the radar apparatus comprising a resistor linked to a capacitor at the frequency of the pulses, the load variation of this capacitor controlling the alarm. The resistor is placed in the circuit of the hyperfrequency transistor which is common to the emission and to the reception. The circuit linking the capacitor to the alarm device comprises a low-pass filter and a step-apparatus. The oscillator controlling the pulses is used to control a direct voltage into direct voltage converter when the power is supplied by a battery.
255393
Stewart & Kolash Ltd
Tacussel Maurice
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