Circular TM.sub.01 to TE.sub.11 waveguide mode converter

Wave transmission lines and networks – Wave mode converters

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333251, H01P 116

Patent

active

049995910

ABSTRACT:
A waveguide mode converting apparatus especially of the TM.sub.01 to TE.sub.11 converting type and usable in circuit waveguide apparatus with desirable high efficiency and relatively small physical size is disclosed. The mode converter employs the combination of an asymmetrically shaped conical frustum waveguide segment together with a radially disposed fin having tapered input and output or ramp surfaces. Details of a 1.3 gigahertz embodiment of the mode converter including dimensions are included along with the results of efficiency measuring and indications of alternate arrangements of the invention.

REFERENCES:
patent: 2129669 (1938-09-01), Bowen
patent: 2546840 (1951-03-01), Tyrrell
patent: 2816271 (1957-12-01), Barker
patent: 3566309 (1971-02-01), Ajioka
patent: 3896449 (1975-07-01), Blume
patent: 3955202 (1976-05-01), Young
patent: 4510469 (1985-04-01), Bowman
patent: 4516088 (1985-05-01), Johnson et al.
New Compact Broadband High-Efficiency Mode Converters For High Power Microwave Tubes With TE.sub.On or TM.sub.On Mode Outputs, M. J. Buckley, G. H. Luo and R. J. Vernon, University of Wisconsin, Madison, Wis. 53706-1691, pp. 797-800.
Microwave Transmission Circuits, George L. Ragan, General Electric Co. Research Lab., First Edition, pp. 379-405.

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