Wideband Magnetoelastic Frequency - Selective Limiter for VHF

Abstract

In the report, the results of one year's progress are summarized for the construction of a frequency-selective Limiter that uses parametric generation of subharmonic magnetoelastic modes in ferrimagnetic materials. Special attention is given to the results of tests performed during the second six months on the broadband models constructed. Based on the theory of operation and test results presented in the First Technical Report, the philosophy of broadband frequency-selective limiter circuit design is presented. The importance of pumping direction, material selection, and orientation is discussed. The material used in the final model is YIG:Ga, a highly doped garnet. The final orientation was made to provide a low internal saturation magnetic field to provide a low limiting threshold. Tests of the final model indicated that extremely selective limiting (about 3 KHz selectivity), low intermodulation levels, and linear small signal phase response are obtainable at VHF.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1969
Accession Number
AD0849932

Entities

People

  • Roger W. Orth

Organizations

  • Boeing

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bandpass Filters
  • Bandwidth
  • Breadboard Models
  • Broadband
  • Circuits
  • Contracts
  • Frequency
  • Lc Circuits
  • Magnetic Fields
  • Magnetic Materials
  • Magnetic Phenomena
  • Materials
  • Networks
  • Orientation (Direction)
  • Resonant Circuits
  • Test And Evaluation
  • Thermal Conductivity

Readers

  • Radio communications and signal processing.
  • Systems Analysis and Design
  • Technical Research and Report Writing.