FERROELECTRIC CERAMIC FILTERS, IF TRANSFORMERS, AND NETWORKS

Abstract

Uni-Wafer filters with 5 and 7 dot-resonators per ceramic wafer were fabricated at 10 mc with pass bandwidths of 670 kc and 270 kc respectively. In each case the individual dot-resonator was tuned to frequency by adjusting the thickness of its electrodes by electroplating. Forward and reverse electroplating of silver on silver or copper base electrodes was used to shift characteristic frequencies by more than !400 kc. Vacuum deposition presents a second method for tuning resonators, with an improvement in resonant resistance over electroplating. From the literature on quartz resonators it was surmised that many of the techniques used in ceramic filters should also be applicable to quartz. This was demonstrated to be the case with the fabrication and testing of several narrow band quartz T-section ladder filters centered at 10 mc. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1962
Accession Number
AD0282835

Entities

People

  • D.j. Koneval
  • Damian Curran

Tags

DTIC Thesaurus Topics

  • Bandwidth
  • Coatings
  • Deposition (Materials Processing)
  • Electrodes
  • Electroplating
  • Fabrication
  • Frequency
  • Literature
  • Quartz Resonators
  • Resistance
  • Resonators
  • Thickness
  • Transformers
  • Vacuum Deposition

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Microwave Engineering.