Actions for Doppler radar with multiphase modulation of transmitted and reflected signal

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Doppler radar with multiphase modulation of transmitted and reflected signal

Author
Griffin, John W.
Published
Aug 22, 1989.
Physical Description
1 electronic document
Additional Creators
Kobayashi, Herbert S. and Shores, Paul W.
Online Version

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Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
A microwave radar signal is generated and split by a circulator. A phase shifter introduces a series of phase shifts into a first part of the split signal which is then transmitted by antenna. A like number of phase shifts is introduced by the phase shifter into the return signal from the target. The circulator delivers the phase shifted return signal and the leakage signal from the circulator to a mixer which generates an IF signal output at the Doppler frequency. The IF signal is amplified, filtered, counted per unit of time, and the result displayed to provide indications of target sense and range rate. An oscillator controls rate of phase shift in the transmitted and received radar signals and provides a time base for the counter. The phase shift magnitude increases may be continuous and linear or discrete functions of time.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19900010964.
Accession ID: 90N20280.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 17030780