Accession Number : AD0432977

Title :   ELECTRO-OPTICAL SIGNAL PROCESSING TECHNIQUES FOR PHASED ARRAY ANTENNAS.

Descriptive Note : Quarterly progress rept., 1 Oct-31 Dec 63,

Corporate Author : COLUMBIA UNIV NEW YORK SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Aimette,A. ; Arm,M. ; Lambert,L.

Report Date : 01 JAN 1964

Pagination or Media Count : 56

Abstract : The research program leading to the development of a signal processor for phased array antennas utilizing the time delay and spatial multiplexing techniques is reviewed. A summary of the basic one-dimensional spectrum analyzer theory is presented. An electro-optical spectrum analyzer which is the major component of the phased array processor is described. An experimental model containing a single channel ultrasonic light modulator and a helium-neon gas laser light source is used to determine system performance. For a 15-mc and a 20-mc signal excitation, the theoretical resolution width of 20 kc was obtained indicating a diffraction limited optical system. Experimental measurements of the scattered light level are also presented indicating that a system dynamic range of 40 db is feasible. The signal simulator, transducer drivers, and the 24-channel light modulator designed for the experimental spatially multiplexed system are also described. (Author)

Descriptors :   (*ANTENNAS, DATA PROCESSING), (*ELECTRON OPTICS, SPECTRUM ANALYZERS), (*SPECTRUM ANALYZERS, ANTENNAS), (*DATA PROCESSING, ANTENNAS), MULTIPLEXING, ULTRASONIC RADIATION, LIGHT, MODULATORS, LASERS, NEON, HELIUM, GASES, HIGH FREQUENCY, DIFFRACTION, SIMULATION, TRANSDUCERS, DELAY LINES

Distribution Statement : APPROVED FOR PUBLIC RELEASE