A DESIGN PROCEDURE FOR TAPPED-DELAY-LINE COMPRESSION FILTERS

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.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1965
Accession Number
AD0474095

Entities

People

  • Harry S. Hewitt

Organizations

  • Stanford University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Attenuation
  • Bandwidth
  • Broadband
  • Compression
  • Computer Programs
  • Computers
  • Delay Lines
  • Electronics Laboratories
  • Excitation
  • Frequency
  • Frequency Response
  • Losses
  • Optimization
  • Pulse Compression
  • Sidelobes
  • Time Intervals

Readers

  • Image Processing and Computer Vision.
  • Phased Array Antenna Design.
  • Radar Systems Engineering.

Technology Areas

  • Space