DE2308812

A mixer phase detects echo pulses from a target with transmission pulses each having a predetermined frequency and serving as a range gating signal to form a pulse train having a Doppler wave as its envelope. The pulse train is applied to a holding capacitor to provide the Doppler wave. A counter co...

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Bibliographische Detailangaben
Hauptverfasser:	MASUNO, YOSHIKI, TAKARAZUKA, KONDOH, TERUO, KAWANI, FUKUHARA, NAOYUKI, ITAMI, BAN, KAZUHIRO, KAWANI, HYOGO, KOJIMA, JIRO, HIGA, YAMAGUCHI
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	A mixer phase detects echo pulses from a target with transmission pulses each having a predetermined frequency and serving as a range gating signal to form a pulse train having a Doppler wave as its envelope. The pulse train is applied to a holding capacitor to provide the Doppler wave. A counter counts the Doppler waves to produce an output in response to its count exceeding a predetermined value. Alternatively after having expanded its pulses by a stray capacitance around the output of the mixer, the pulse train may be demodulated to the Doppler wave by a sample holding circuit controlled with sampling pulses synchronized with the transmission pulses.