New compact broadband high-efficiency mode converters for high power microwave tubes with TE/sub 0n/ or TM/sub 0n/ mode outputs

摘要

Shorter, broader bandwidth designs are discussed for TE/sub 03/-TE/sub 02/ and TE/sub 02/-TE/sub 01/ varying-radius mode converters and TE/sub 01/-TE/sub 11/ serpentine mode converters for a 2.779-cm-diameter circular waveguide for 60- and 140-GHz gyrotrons. Designs combing TE/sub 0n/-TE/sub 0n-1/ converters with a 6.35-2.779-cm-diameter taper are presented. A TM/sub 01/-TE/sub 11/ serpentine mode converter design for a frequency of 8.6 GHz in a 4.76-cm circular waveguide is also discussed. Measured results are presented.