A high-efficiency 59- to 64-GHz TWT for intersatellite communications

Author

Wilson, J.D. ; Ramins, P. ; Force, D.A. ; Limburg, H.C. ; Tammaru, I.

Author_Institution

NASA Lewis Res. Center, Cleveland, OH, USA

fYear

1991

fDate

8-11 Dec. 1991

Firstpage

585

Lastpage

588

Abstract

The design of a 75-W, 59-64 GHz TWT (traveling wave tube) with a predicted overall efficiency in excess of 40% is described. This intersatellite communications TWT, designated the Hughes Aircraft Company Model 961HA, uses a coupled-cavity slow-wave structure with a two-step velocity taper and an isotropic graphite multistage depressed collector (MDC). Because of the RF efficiency of this TWT is less than 8%, an MDC design providing a very high collector efficiency was necessary to achieve the overall efficiency goal of 40%. Measurements indicated a very high MDC efficiency of 93.9%, very close to the computed value.<>

Keywords

microwave amplifiers; travelling-wave-tubes; 40 percent; 59 to 64 GHz; 75 W; EHF; Hughes Aircraft Company; MDC; Model 961HA; TWT; coupled-cavity; design; efficiency; high collector efficiency; intersatellite communications; isotropic graphite multistage depressed collector; slow-wave structure; traveling wave tube; two-step velocity taper; Anodes; Bandwidth; Cathodes; Circuits; Electrons; Fabrication; NASA; Power generation; Radio frequency; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices Meeting, 1991. IEDM '91. Technical Digest., International

Conference_Location

Washington, DC, USA

ISSN

0163-1918

Print_ISBN

0-7803-0243-5

Type

conf

DOI

10.1109/IEDM.1991.235402

Filename

235402