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Analysis of shielded lossy multilayered-substrate microstrip discontinuities

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2 Author(s)
Tony, E.S. ; Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada ; Chaudhuri, S.K.

The spatial Green's function for a rectangular cavity partially filled with multiple layers of lossy dielectrics has been derived. The Green's function is used to compute the fields around a discontinuity in a transmission line. To analyze a discontinuity, the unknown surface current maintained on the microstrip discontinuity is expanded in terms of known suitable basis functions. The electric-field components in the plane of the discontinuity region are then written in terms of this current. Imposing the boundary condition that the component of the electric-field tangential to the metallization is zero yields the electric-field integral equation (EFIE). The method of moments is applied to the EFIE to obtain a system of linear equations. The resultant semianalytical expressions were used to conduct accurate modeling of a variety of structures. The validity and accuracy of this method are established through comparison with other published results. Convergence considerations are outlined and verified

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:49 ,  Issue: 4 )