Accession Number : ADD006714

Title :   Multiple Channel Electronic Countermeasures Receiver System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Hamer,Edward G

Report Date : 02 Oct 1979

Pagination or Media Count : 5

Abstract : This invention relates to electronic countermeasures systems and, particularly, to multiple channel anti-jam radar receivers that distinguish automatically between the noise characteristics of different jamming signals. Search radar systems generally include anti-jammer circuits in order to insure a satisfactory presentation of returning echoes on the oscilloscope screen when the echoes are presented to the receiver concurrently with jamming signals of the same or nearly the same wavelength. Obtaining an effective video display and a useful demarcation between echo pulses and jamming signals is made all the more difficult in view of the different forms of jamming signals available. In order to prevent extreme insensitivity of the receiver to echo returns, radar systems normally employ an operator stationed at an anti-jam console whose responsibility is to analyze and identify the specialized jamming signals and then, judging from the anti-ECM performance of the system, to select from several alternate receivers one receiver considered to be best adapted to combat the jamming used. The optimum receiver in most cases is simply coupled to the receiver link by manual selections made at a console. Manual selection of this nature is adequate until a complex jamming environment presenting many types of jamming is encountered.

Descriptors :   *Patents, *Radar antijamming, Radar receivers, Logic circuits

Subject Categories : Radar Countermeasures
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE