Accession Number:

AD0163833

Title:

Doppler Radar with Target Velocity Direction and Range Indication, Utilizing a Variable-Frequency Generator.

Descriptive Note:

Patent,

Corporate Author:

OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C

Personal Author(s):

Report Date:

1972-01-11

Pagination or Media Count:

4.0

Abstract:

The patent describes a radar where the energy output from the CW oscillator is periodically phase shifted plus and minus 22.5 deg under the control of the output of a variable frequency square wave generator. The echo signals are combined with a sample of the transmitted signals and applied to a single mixer. A pair of Doppler signals are sequentially derived from the mixer output by means of a gate circuit operated by the square wave generator. At a certain generator frequency which depends on target range, the relative phases of the two Doppler signals will indicate the sense of direction of target movement. The generator frequency-adjusting means can be calibrated in terms of target range.

Subject Categories:

  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE