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Slit coupled E-plane rectangular T-junctions using single port mode matching technique

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3 Author(s)
Abdelmonem, A. ; Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA ; Hui-Wen Yao ; Zaki, K.A.

A new simple mode matching method, called single port mode matching technique (SPMMT) for modeling rectangular waveguide T-junctions is presented. The reflection coefficient at port 2 (side arm of the T-junction) is computed with both ports 1 and 3 shorted. The three-port scattering matrix of the T-junction is obtained from nine reflection coefficient computations using different short circuit lengths in ports 1 and 3. This method is rigorous, simple, reduces the computational effort significantly and can be applied to other structures. Comparison of S-parameters with classical equivalent circuit in Marcuvitz(1951) and new equivalent circuit given by Lampariello and Oliner(1993) is presented. Dependence of S-parameters on the slit thickness is also given. Open T-junctions are analyzed as a special case of the slit T-junction, and the results are in good agreement with experimental measurements

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:42 ,  Issue: 5 )

Date of Publication:

May 1994

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