Accession Number : AD0474095


Title :   A DESIGN PROCEDURE FOR TAPPED-DELAY-LINE COMPRESSION FILTERS


Descriptive Note : Technical rept.


Corporate Author : STANFORD UNIV CA STANFORD ELECTRONICS LABS


Personal Author(s) : Hewitt, Harry S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/474095.pdf


Report Date : Sep 1965


Pagination or Media Count : 87


Abstract : A compression-filter design is described which utilizes 76 broadband taps spaced nonuniformly along a delay line. Also described is a computer program, written in FORTRAN II language, which can be used to calculate the individual tap positions and weightings for a maximum-response peak-to-sidelobe ratio. Computations made using the computer program resulted in a compression filter matched to an excitation which changed frequency linearly with time over an octave bandwidth and which had a time-bandwidth product of 50. The response of this filter was a compressed pulse with a peak-to-sidelobe ratio of over 100. In addition, the filter proved to be less sensitive to scan-rate errors than a continuously dispersive filter with the same compression characteristics. Experimental results were obtained on a 76-tap compression filter designed to operate in the 1- to 2-Gc frequency range. The performance of this filter tends to confirm the validity of the technique and provides an encouraging basis for future work.


Descriptors :   *DELAY LINES , *PULSE COMPRESSION , BROADBAND , COMPUTER PROGRAMMING , ELECTRIC FILTERS , ELECTROMAGNETIC PULSES , EQUATIONS , EXPERIMENTAL DATA , FREQUENCY MODULATION , PHASE(ELECTRONICS) , PROGRAMMING LANGUAGES , RESPONSE , SENSITIVITY , ULTRAHIGH FREQUENCY


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE