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

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4 Author(s)
Lawson, W. ; Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA ; Arjona, M.R. ; Hogan, B.P. ; Ives, R.L.

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

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:48 ,  Issue: 5 )