Accession Number : ADD014323

Title :   Automatic Thresholding Multichannel Digital Radar Early Warning System.

Descriptive Note : Patent, Filed 4 Apr 88, patented 22 Aug 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Huntley, William P

Report Date : 22 Aug 1989

Pagination or Media Count : 6

Abstract : An RF multiplexer divides an incoming signal from an RF antenna into discrete frequency bands. Each frequency band has its own separate circuit on separate lines to operate on the frequency band and determine if a radar signal is present or if only noise is present on the line. This is done by comparing the incoming signal for magnitude with a DC signal that is generated within the circuit and is proportional to the noise within the frequency band. An indication that any of the signals within the discrete frequency bands exceed the DC signal generated within the same band results in an alarm indication. Patents. PAT-CL-342-20.

Descriptors :   *EARLY WARNING SYSTEMS, *RADAR, *MULTICHANNEL, ANTENNAS, DIRECT CURRENT, FREQUENCY BANDS, MULTIPLEXING, NOISE, PATENTS, RADAR SIGNALS, RADIOFREQUENCY, SIGNALS

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE