Development of a 10 MW, 91 GHz gyroklystron

Author

Neilson, J.M. ; Ives, R.L. ; Read, M. ; Lawson, W.

Author_Institution

Calabazas Creek Res. Inc., Saratoga, CA, USA

fYear

2000

fDate

2-4 May 2000

Abstract

The design uses the second-harmonic mode to reduce the magnetic field requirements and use available TWT drivers. The current circuit design employs five cavities. The input cavity is a fundamental cavity operating with the TE/sub 011/ mode and using radial coupling. The following buncher cavities operate with the TE/sub 021/ mode and are stagger tuned to improve efficiency and bandwidth. The output cavity operates in the TE/sub 021/ mode and has smooth-wall transitions along with a non-linear output taper to minimize mode conversion. A conventional, double anode, magnetron injection gun generates the electron beam. Following the circuit, a large radial gap is introduced in the output waveguide to allow voltage depression of the beam collector to increase the overall efficiency. A hybrid mode is used (TE01/02) to maximize transmission across the gap.

Keywords

gyrotrons; harmonic generation; klystrons; millimetre wave tubes; travelling wave tubes; 10 MW; 91 GHz; TE/sub 011/ mode; TE/sub 021/ mode; TWT drivers; bandwidth; beam collector; buncher cavities; cavities; current circuit design; double anode magnetron injection gun; efficiency; fundamental cavity; gyroklystron; hybrid mode; input cavity; magnetic field; mode conversion; nonlinear output taper; output cavity; radial coupling; radial gap; second-harmonic mode; smooth-wall transitions; voltage depression; Anodes; Bandwidth; Circuit synthesis; Coupling circuits; Driver circuits; Electron beams; Klystrons; Magnetic fields; Tellurium; Waveguide discontinuities;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2000. Abstracts. International

Conference_Location

Monterey, CA, USA

Print_ISBN

0-7803-5987-9

Type

conf

DOI

10.1109/OVE:EC.2000.847437

Filename

847437