Title :
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
fDate :
5/1/2000 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
