Experimental investigation of Ka-band harmonic multiplying gyro-TWT

C. W. Baik, S. G. Jeon, D. H. Kim, G. S. Park, N. Sato, K. Yokoo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Summary form only given. To achieve high power millimeter waves at Ka-band, a harmonic-multiplying gyro-TWT is developed. The designed interaction circuit is a 2-stage waveguide that consists of input and output sections divided by severing. Both stages are linearly tapered rectangular waveguides in which the fundamental TE10 mode is used. Tapering the waveguides increases stabilities and bandwidth by distributed interaction when the grazing condition along the taper is satisfied. In this study, each stage employs X-band and Ka-band frequencies, respectively. Through the fundamental and the 3rd electron cyclotron harmonics at each stage, a harmonic-multiplying interaction occurs. As a result, a saturated gain of 23 dB, an electronic efficiency of 10%, and a bandwidth of 3% were predicted by a self-consistent nonlinear calculation on the assumption of 4% axial velocity spreads of electrons when an axis-encircling electron gun at a moderate beam voltage of 30 kV and a current of 1 A is employed.

Original languageEnglish
Title of host publicationConference Digest - 27th International Conference on Infrared and Millimeter Waves, IRMMW 2002
EditorsRichard J. Temkin
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages239-240
Number of pages2
ISBN (Electronic)0780374231, 9780780374232
DOIs
Publication statusPublished - 2002
Event27th International Conference on Infrared and Millimeter Waves, IRMMW 2002 - San Diego, United States
Duration: 2002 Sep 222002 Sep 26

Publication series

NameConference Digest - 27th International Conference on Infrared and Millimeter Waves, IRMMW 2002

Other

Other27th International Conference on Infrared and Millimeter Waves, IRMMW 2002
CountryUnited States
CitySan Diego
Period02/9/2202/9/26

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Instrumentation
  • Radiation

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