Analysis of the electromagnetic waves in an overmoded finite length slow wave structure

Author

Amin, Md Ruhul ; Ogura, K. ; Kitamura, H. ; Minami, K. ; Watanabe, T. ; Carmel, Y. ; Main, W. ; Weaver, J. ; Destler, W.W. ; Granatstein, V.L.

Author_Institution

Graduate Sch. of Sci. & Technol., Niigata Univ., Japan

Volume

43

Issue

4

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

815

Lastpage

822

Abstract

The electromagnetic fields of the higher order axial resonant modes in a slow wave structure are analyzed and found to have considerably different characteristics from those of the conventional fundamental mode. Here, the reflections at both ends produce axial resonant modes corresponding to axisymmetric transverse magnetic (TM) modes. The period of field modulation of some of the higher order axial modes is shorter than that of the usual mode in a cylindrical waveguide, which could be of practical interest for higher power, higher frequency operation of backward wave oscillators. A perturbation technique is used to ascertain the field distribution inside the resonant cavity, and the numerical results thus obtained are compared to some experimental data

Keywords

backward wave oscillators; cavity resonators; electromagnetic field theory; perturbation techniques; slow wave structures; BWO; axisymmetric TM modes; backward wave oscillators; electromagnetic fields; electromagnetic waves; field distribution; field modulation period; higher order axial resonant modes; overmoded finite length structure; perturbation technique; resonant cavity; slow wave structure; transverse magnetic modes; Electromagnetic analysis; Electromagnetic fields; Electromagnetic reflection; Electromagnetic scattering; Electromagnetic waveguides; Frequency; Magnetic analysis; Magnetic resonance; Oscillators; Perturbation methods;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.375229

Filename

375229