Distributed Ferrite Isolation in Traveling-Wave Tubes.

Abstract

The report describes the status after one year of a program to introduce distributed ferrite isolation in a high power CW traveling-wave tube of broad bandwidth >1 octave. Cold tests indicate feasibility of over 50 dB reverse loss and only 5 dB forward loss. The best results occur when there is coupling to broadband edge modes of ferrite slabs. Evidence of coupling to the lower branch of edge mode, i.e., magnetostatic, has been obtained with L-band helix. Cold tests and analysis suggest coupling to ferrite edge modes from helix is easier at higher microwave frequencies. Plans for a hot test at the 1-2 kW power level is an L-band TWT incorporating such distributed ferrites are described.

Document Details

Document Type
Technical Report
Publication Date
Sep 02, 1975
Accession Number
ADA016285

Entities

People

  • Daniel Masse
  • John Osepchuk

Organizations

  • RTX

Tags

DTIC Thesaurus Topics

  • Bandwidth
  • Broadband
  • Couplings
  • Frequency
  • Frequency Bands
  • Frequency Shift
  • L Band
  • Microwave Frequency
  • Microwaves
  • Power Levels
  • Traveling Wave Tubes
  • Traveling Waves
  • Waves

Fields of Study

  • Physics

Readers

  • Electronics Engineering
  • Microwave Engineering.