Distributed Ferrite Isolation in Traveling-Wave Tubes.

reportActive / Technical Report | Accession Number: ADA016285 | Need Help?

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.

Author(s):
Osepchuk, John ; Masse, Daniel
Author Organization(s):
RAYTHEON CO WALTHAM MASS RESEARCH DIV
Descriptive Note:
Annual status rept. Jun 74-Jul 75,
Pagination:
0118

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-74-C-0322
Task Number(s):
RF54545001
Project Number(s):
NR-251-016, RF54-545
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*TRAVELING WAVE TUBES, *FERRITES, COUPLING(INTERACTION), ISOLATION, VARIATIONS, MICROWAVE TUBES, L BAND, ELECTRON TUBE COMPONENTS
Field(s)/Group(s):
Electrical and Electronic Equipment
Report Date:
1975 Sep 02