Accession Number : AD0844329

Title :   Array Modulation Techniques.

Descriptive Note : Final rept. 25 Nov 66-15 May 68,

Corporate Author : SYLVANIA ELECTRIC PRODUCTS INC WALTHAM MA

Personal Author(s) : Ku, Walter ; Glynn, Thomas ; Ver Planck, Peter

Report Date : OCT 1968

Pagination or Media Count : 292

Abstract : The report contains the results obtained from a study program to determine the maximum modulation capabilities of microwave scatterers using integrated spiral-antenna tunnel-diode reflection amplifiers. A linear time-varying network model of the modulated scatterers is used to calculate the modulation characteristics. Techniques involving subcarrier modulation have been utilized to increase the modulation capability of the scatterers. Antenna array patterns for a general class of modulated active arrays have been calculated. Amplitude tapering and beam steering using sub-carrier phase-shifting have been considered. Theoretically calculated results are verified by extensive measurements. In addition to the tunnel-diode scatterers, modulation of avalanche diode reflection amplifiers has also been studied and results presented. (Author)

Descriptors :   (*ANTENNA ARRAYS, SCATTERING), SPIRAL ANTENNAS, AMPLIFIERS, TUNNEL DIODES, INTEGRATED SYSTEMS, MICROWAVES, MODULATION, AVALANCHE DIODES, REFLECTION, ANTENNA RADIATION PATTERNS, RELIABILITY(ELECTRONICS).

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE