Accession Number : AD0641370
Title : ULTRA WIDEBAND DIGITAL DELAY LINE
Descriptive Note : Final rept.
Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
Personal Author(s) : Payne, III, John B
PDF Url : AD0641370
Report Date : Sep 1966
Pagination or Media Count : 83
Abstract : The report presents the detailed technical analysis, experimental results, and problems encountered in the design and construction of a four-bit digital delay line having an instantaneous, nondispersive, and lossless bandwidth of 400 mc/s. The frequency range covered was from 50 to 450 mc/s. The signal was switched either through or around the different time delay elements. The switches consisted of wideband amplifiers which minimize amplitude and phase fluctuations across the band and between the different signal paths. Switching was performed by purely electronic means with switching time less than 50 nanoseconds. Amplitude variations up to 400 mc/s were less than 1 db with a phase error of 2 degrees. At 450 mc/s the errors were 3 db and 10 degrees, respectively. Also covered is the use of such a device for i-f time delay steering of wideband array antennas. Problems encountered in properly terminating wideband delay lines and component selection and layout are discussed.
Descriptors : *DELAY LINES, ANTENNA ARRAYS, BROADBAND, DIGITAL SYSTEMS, PHASED ARRAYS, TRANSISTOR AMPLIFIERS, ULTRAHIGH FREQUENCY, VERY HIGH FREQUENCY
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE