Analysis of High Power Millimeter Wave Waveguide Mode Converters with Input Mode Mixture |
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Authors: | Shiwen Yang Soon Hie Tan Hongfu Li |
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Affiliation: | (1) School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798;(2) Research Institute of High Energy Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, People's Republic of China |
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Abstract: | Based on the coupled mode theory, this paper presents the study on the influence of input mode mixture in circular oversized waveguide mode converters. Three kinds of commonly used waveguide mode converters, including the waveguide mode converters with varying wall radius or small axis perturbations, and the waveguide mode converters with bent structures, are taken as the examples. The results show that the spurious input modes do not simply superimpose onto the output modes, and in some cases they may deteriorate the conversion efficiency for the main output mode. Methods for transforming such spurious input mode mixture simultaneously into the main output mode are also presented in this paper. |
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Keywords: | mode coupling mode mixture circular waveguide |
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