G - Physics – 01 – S
Patent
G - Physics
01
S
343/62
G01S 7/28 (2006.01) G01S 7/06 (2006.01) G01S 13/18 (2006.01)
Patent
CA 1037145
ABSTRACT OF THE DISCLOSURE A generator produces a pulse train of reference pulses which modulate a carrier signal from a local oscillator to produce a pulsed microwave signal for transmission to a target. A reflected signal from the target is combined with a portion of the carrier signal in a mixer to produce an intermediate frequency signal that is sampled at predetermined sampling positions by a gate, resulting in a detected video signal. Pulses control the gate and are produced by a circuit in response to a signal from a comparator that determines the positions by comparing two reference signals which are generated by circuits responsive to the reference pulses. The video signal includes only relatively low frequencies which can be amplified and displayed using inexpensive low frequency components. Moreover, a displayed video signal is clear and reduces erroneous observations caused by noise pulses which are suppressed by the low frequency components.
220980
Noda Hiroshi
Watanabe Yukiyasu
LandOfFree
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