Accession Number : ADA016285


Title :   Distributed Ferrite Isolation in Traveling-Wave Tubes.


Descriptive Note : Annual status rept. Jun 74-Jul 75,


Corporate Author : RAYTHEON CO WALTHAM MASS RESEARCH DIV


Personal Author(s) : Osepchuk,John ; Masse,Daniel


Report Date : 02 SEP 1975


Pagination or Media Count : 118


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.


Descriptors :   *TRAVELING WAVE TUBES, *FERRITES, COUPLING(INTERACTION), ISOLATION, VARIATIONS, MICROWAVE TUBES, L BAND, ELECTRON TUBE COMPONENTS.


Subject Categories : ELECTRICAL AND ELECTRONIC EQUIPMENT


Distribution Statement : APPROVED FOR PUBLIC RELEASE