Accession Number : AD0476543

Title :   INTERFERENCE REDUCTION TECHNIQUES FOR PULSED TRANSMITTERS.

Descriptive Note : Quarterly progress rept. no. 1, 15 Aug-15 Nov 65,

Corporate Author : ENERGY SYSTEMS INC PALO ALTO CA

Personal Author(s) : Goldfarb, Eli M. ; Cumming, Raymond C.

Report Date : NOV 1965

Pagination or Media Count : 29

Abstract : The purpose of this project is to investigate the interference producing characteristics of pulsed transmitters and then to seek techniques to minimize this generation of spurious emission exclusive of filtering and shielding. An investigation was completed of microwave tube characteristics, pulse shaping techniques, system concepts and an analysis of electromagnetic compatibility merit. Results so far, while tentative, indicate a general need for tube manufacturers, modulator designers and system planners to incorporate more of the existing techniques for reducing spurious emission, and to substantially increase the availability of relevant information. There are numerous examples of radars interfering with each other and with other electronic equipment. There is a general lack of information on pertinent microwave tube noise and distortion characteristics, transmitter spectrum signatures, and application of shaped pulse designs to existing systems. A discussion is presented of the EMC aspect of radar performance and the merits of four representative signals with respect to EMC, range resolution and range ambiguity on the basis of equal detection probability and range accuracy. The spectra for near-gaussian pulse shapes are also compared. (Author)

Descriptors :   *RADAR INTERFERENCE), (*RADAR TRANSMITTERS, (*ELECTROMAGNETIC COMPATIBILITY, RADAR TRANSMITTERS), REDUCTION, ELECTRON TUBES, MICROWAVE EQUIPMENT, RADAR PULSES, MODULATORS, RADIOFREQUENCY INTERFERENCE, NOISE(RADAR), SPECTRUM SIGNATURES, RESOLUTION, PHASE MODULATION.

Subject Categories : Active & Passive Radar Detection & Equipment
      Electromagnetic Pulses

Distribution Statement : APPROVED FOR PUBLIC RELEASE