PREFERRED-CIRCUIT TECHNIQUES FOR VARACTOR-TUNED FILTERS

Abstract

This report describes an investigation of circuit techniques to minimize spurious responses in varactor-tuned filters. Design equations for the center frequency, bandwidth and insertion loss of single and multiple-resonator filters are presented. Series-resonant filters with one and two resonators were constructed and measurements of their performance characteristics were made. One- and two-resonator filters were also constructed using a pair of opposingly biased varactors (push-pull circuit) for each resonator. Measurements show that such a circuit can significantly reduce the second-harmonic generation and the response to a signal at one half the tuned frequency.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1967
Accession Number
AD0808504

Entities

People

  • Gerald Kannischak
  • Solomon Hecht

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bandwidth
  • Cross Modulation
  • Demographic Cohorts
  • Detuning
  • Dynamic Range
  • Equivalent Circuits
  • Filters
  • Insertion Loss
  • Measurement
  • Modulation
  • Networks
  • Resonant Circuits
  • Rlc Circuits
  • Second Harmonic Generation
  • Tuned Circuits
  • Tuned Filters
  • Tuning

Fields of Study

  • Engineering
  • Physics

Readers

  • Electronics Engineering
  • Microwave Engineering.