Title :
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
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);
Conference_Titel :
Vacuum Electronics Conference, 2008. IVEC 2008. IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-1715-5
DOI :
10.1109/IVELEC.2008.4556428
