Broadband High-Power 18-Beam S-Band Klystron Amplifier Design

Author

Nguyen, Khanh T. ; Wright, Edward L. ; Pershing, Dean E. ; Abe, David K. ; Petillo, John J. ; Levush, Baruch

Author_Institution

Beam-Wave Res. Inc., Bethesda, MD

Volume

56

Issue

5

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

883

Lastpage

890

Abstract

Fundamental-mode multiple-beam klystrons (MBKs) offer the potential of high power and broad bandwidth with low noise at low beam voltages in a compact amplifier form factor. This paper presents the design approach and methodology for an S-band MBK. This amplifier will be driven by a newly developed 41.6-A 42-kV 18-beam electron gun. The high total beam perveance permits the circuit design to achieve a peak power of 670 kW in S-band and a corresponding 1-dB bandwidth of 13% (16% at 3-dB). The high beam perveance, however, requires special considerations in the common collector design, particularly with respect to the spent modulated electron beams. To fully account for the impact of the time-varying beam current, the time-dependent 3-D gun/collector code MICHELLE was employed for this collector design.

Keywords

circuit noise; electron guns; klystrons; microwave amplifiers; millimetre wave amplifiers; wideband amplifiers; MICHELLE collector codes; circuit design; compact amplifier form factor; current 41.6 A; electron gun; klystron amplifier design; multiple-beam klystrons; noise figure 1 dB; time-varying beam current; voltage 42 kV; Bandwidth; Broadband amplifiers; Circuit noise; Circuit synthesis; Design methodology; Electrons; High power amplifiers; Klystrons; Low voltage; Low-noise amplifiers; Amplifier; broadband; collector; high perveance; klystron; multiple beam; multiple-beam klystron (MBK);

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2009.2015411

Filename

4811971