High functionality mode transformers with bandwidth control and mode selectivity

We propose high functionality field transformation in irregular rectangular waveguide structures. Multiresolution optimization allows good convergence and a stepped wall profile provides for a large number of degrees of freedom. The resulting structures are compact, with dimension of a few wavelengt...

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Bibliographic Details
Published in2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278) Vol. 3; pp. 2013 - 2016 vol.3
Main Authors Ming-Chuan Yang, Webb, K.J.
Format Conference Proceeding Journal Article
LanguageEnglish
Published IEEE 2002
Subjects
Bandwidth
Design optimization
Dielectrics
Frequency conversion
Optical filters
Optical scattering
Optical waveguides
Periodic structures
Rectangular waveguides
Transformers
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Summary:We propose high functionality field transformation in irregular rectangular waveguide structures. Multiresolution optimization allows good convergence and a stepped wall profile provides for a large number of degrees of freedom. The resulting structures are compact, with dimension of a few wavelengths, and can have functionality not achievable through periodic means. For illustration, we have designed frequency-dependent mode converters, mode-selective reflectors, and multiple mode converters, where more than one mode is converted simultaneously, all with virtually 100% efficiency. Non-uniqueness affords design selection based on the frequency response.
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ISBN:9780780372399
0780372395
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2002.1012262