Investigation of a Ridge-Loaded Folded-Waveguide Slow-Wave System for the Millimeter-Wave Traveling-Wave Tube

Author

He, Jun ; Wei, Yanyu ; Lu, Zhigang ; Gong, Yubin ; Wang, Wenxiang

Author_Institution

Nat. Key Lab. of High-Power Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

38

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

1556

Lastpage

1562

Abstract

In this paper, a ridge-loaded folded-waveguide slow-wave structure (SWS) for millimeter-wave traveling-wave tube (TWT) is presented. The theory of high-frequency characteristics, which includes: 1) the dispersion properties; and 2) the beam-wave interaction impedance of this structure, is analyzed. The theoretical results agree well with those obtained by the 3-D electromagnetic simulation software HFSS. The relationships of the dispersion characteristics and the interaction impedance versus ridge dimensions are numerically calculated and discussed. It is indicated from the investigation that the ridge loading can decrease the phase velocity and the relative bandwidth; however, the interaction impedance increases noticeably. A ridge-loaded folded-waveguide SWS with proper ridge dimensions may be applied for higher gain and electron efficiency in millimeter-wave regimes.

Keywords

electrical engineering computing; frequency selective surfaces; millimetre wave tubes; numerical analysis; slow wave structures; 3-D electromagnetic simulation software HFSS; TWT; beam-wave interaction impedance; dispersion properties; high-frequency characteristic theory; millimeter-wave traveling-wave tube; ridge-loaded folded-waveguide slow-wave system; Folded waveguide; millimeter-wave traveling-wave tube (TWT); ridge-loaded; slow-wave structure (SWS);

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2010.2049506

Filename

5471135