The design of serpentine-mode converters for high-power microwave applications

Author

Lawson, Wes ; Arjona, Melany R. ; Hogan, Bart P. ; Ives, R.L.

Author_Institution

Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA

Volume

48

Issue

5

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

809

Lastpage

814

Abstract

In this paper, we report the design methodology and numerical results for two mode converters that are suitable for high-power microwave applications. Both converters are designed to operate at 11.424 GHz and utilize periodic serpentine structures to convert between modes with different azimuthal-mode indexes. The first converts about 98.5% of an incident linearly polarized TE₁₂ mode to the TE ₀₁ mode when oriented as an H-plane bend, but has just 1% mode conversion to all modes when oriented as an E-plane bend. The second device converts a linearly polarized TE₁₁ mode to a TM ₀₁ mode with over 99.99% effectiveness. The performance of both devices with respect to parametric variations is detailed. Experimental measurements of the radiation patterns from the TE₁₂-to-TE₀₁-mode converter are consistent with the theoretical predictions

Keywords

circular waveguides; convertors; periodic structures; waveguide components; 11.424 GHz; E-plane bend; H-plane bend; TE₀₁ mode; TM₀₁ mode; azimuthal-mode indexes; high-power microwave applications; incident linearly polarized TE₁₂ mode; linearly polarized TE₁₁ mode; parametric variations; periodic serpentine structures; radiation patterns; serpentine-mode converters; Coaxial components; Design methodology; Gyrotrons; Microwave devices; Microwave oscillators; Microwave theory and techniques; Periodic structures; Planar waveguides; Polarization; Waveguide components;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.841875

Filename

841875