Communications: directive radio wave systems and devices (e.g. – Determining velocity – Other than doppler
Patent
1987-11-25
1989-08-22
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Determining velocity
Other than doppler
342114, 342195, G01S 1358
Patent
active
048600148
ABSTRACT:
A microwave radar signal is generated (16) and split by a circular (20). A phase shifter (24) introduces a plurality of phase shifts into a first part of the split signal which is then transmitted (36) by antenna (34). A like plurality of phase shifts are introduced by the phase shifter into the return signal (40) from the target. The circulator delivers the phase shifted return signal and the leakage signal from the circulator to a mixer (44) which generates an i.f. signal output at the doppler frequency. The i.f. signal is amplified (46l ), filtered (54), counted (58) per unit of time and the result displayed (62) to provide indications of target sense and range rate. An oscillator (50) controls rate of phase shift in the transmitted and received signals and provides a time base for the counter. The phase shift magnitude increases may be continuous and linear or discrete functions of time.
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Griffin John W.
Kobayashi Herbert S.
Shores Paul W.
Barr Hardie R.
Fein Edward K.
Gregory Bernarr Earl
Manning John R.
Tarcza Thomas H.
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