Progress on fabrication and testing of the omniguide traveling-wave tube structures

Author

Smirnova, Evgenya I. ; Carlsten, Bruce E. ; Earley, Lawrence M.

Author_Institution

ISR-6, Los Alamos Nat. Lab., Los Alamos, NM

fYear

2008

fDate

22-24 April 2008

Firstpage

85

Lastpage

86

Abstract

We have designed, fabricated and tested with low power a novel W-band traveling-wave tube (TWT) structure based on a slow-wave cylindrically-symmetric photonic band gap (PBG) structure, or an "omniguide". PBG TWT structures have great potential for very large bandwidth and linear dispersion. The omniguide structure was designed and fabricated with silica dielectric with a copper harness. Cold-test results were found to be in excellent agreement with the design. A band-width of more than 10 per cent was demonstrated. This structure is designed to generate millimeter-wave rf when driven by a 2-A, 120-kV electron beam.

Keywords

dielectric-loaded waveguides; millimetre wave generation; millimetre wave power amplifiers; photonic band gap; slow wave structures; travelling wave tubes; PBG TWT structures; W-band traveling-wave tube structure; cold-test results; copper harness; current 2 A; dilectric loaded waveguides; electron beam; linear dispersion; millimeter-wave rf generation; millimetre wave power amplifiers; omniguide traveling-wave tube structures; silica dielectric; slow-wave cylindrically-symmetric photonic band gap structure; voltage 120 kV; Bandwidth; Dielectric materials; Fabrication; Frequency; Laboratories; Periodic structures; Photonic band gap; Power amplifiers; Silicon compounds; Testing; dielectric-loaded waveguides; millimeter-wave; photonic band gap structures; power amplifiers; traveling-wave tubes (TWTs);

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2008. IVEC 2008. IEEE International

Conference_Location

Monterey, CA

Print_ISBN

978-1-4244-1715-5

Type

conf

DOI

10.1109/IVELEC.2008.4556428

Filename

4556428