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Ridge waveguide polarizer with finite and stepped-thickness septum

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2 Author(s)
Bornemann, J. ; Lab. for Lightwave Electron., Microwaves & Commun., Victoria Univ., BC, Canada ; Labay, V.A.

This contribution presents new design dimensions for the ridge waveguide septum polarizer. Emphasis is placed first, on including the finite septum thickness in the analysis; second, demonstrating its influence on the polarizer performance; third, including a stepped approach for extremely thick septa; fourth, optimizing components without the need for additional phase-adjusting structures; and fifth, providing the application engineer with some design guidelines. Examples for varying septum thickness and/or number of sections are given for C-, X-, R120-, Ku- and K-band applications. The analysis is based on an efficient mode-matching technique. Evolution-strategy methods are used for optimization. Both algorithms are translated into PC-operational software. Results are compared with previously published theoretical/experimental polarizer data and with a finite-element analysis, and are found to be in good agreement

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:43 ,  Issue: 8 )