Accession Number : ADD003954

Title :   Doppler Radar for Distinguishing Between Approaching and Receding Targets and Having Increased Frequency Response.

Descriptive Note : Patent,


Personal Author(s) : Rittenbach,Otto E

Report Date : 15 Feb 1977

Pagination or Media Count : 8

Abstract : CW is beamed continuously by a radar and is sampled continuously in the radar; the radar continuously senses reflections that are returned to the radar. Only if the distance to a reflecting target is changing significantly per unit time is there an output generated; the output is a positive DC voltage if the distance is closing and a negative DC voltage if the distance is opening. An annunciator arrangement responds to the output DC voltage. Reflection frquency energy is mixed with a sampling of the CW to obtain the difference frequency. At the same time, reflection frequency energy is mixed with +90 degrees phase advanced sampling of the CW to obtain the difference frequency.

Descriptors :   *Patents, *Continuous wave radar, *Doppler radar, Target discrimination, Frequency response, Voltage

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE