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An improved modal expansion method for two cascaded junctions and its application to waveguide filters

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2 Author(s)
Zhongxiang Shen ; Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada ; Macphie, Robert H.

An improved modal expansion method is described for the scattering matrix of a cascaded network which consists of an enlargement junction combined with a reduction junction. The new method can significantly reduce computation time and requirement of computer memory. Application to iris coupled waveguide cavity filters is demonstrated. Numerical results for a rectangular waveguide cavity filter are given

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:43 ,  Issue: 12 )