Measurement system calibrated to be insensitive to temperature v

Details Measurement system calibrated to be insensitive to temperature v Measurement system calibrated to be insensitive to temperature v

1976-06-25

1977-08-09

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 740

Patent

active

040414906

ABSTRACT:
A measurement system wherein a given quantity such as distance, is determined by measuring the phase shift between a transmitted signal and a signal received from a transponder in response to the transmitted signal. The system includes a transmitter, a receiver, a digital phasemeter for measuring the phase shift and for providing a count representative thereof, and a calibration system for making the measurement system insensitive to temperature variation induced change in internal phase shifts present in the transmitter and receiver.

REFERENCES:
patent: 3295130 (1966-12-01), Prestwood
patent: 3302199 (1967-01-01), Kelly et al.
patent: 3427615 (1969-02-01), Hubka
patent: 3471855 (1969-10-01), Thompson
patent: 3766555 (1973-10-01), Watt
patent: 3845484 (1974-10-01), Sawicki et al.
patent: 3883870 (1975-05-01), Kunz
patent: 3973259 (1976-08-01), Hellgren et al.

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