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Title:Application of the spectral domain technique to discontinuity and spurious radiation problems in microwave circuits
Author(s):Kouki, Ammar Ben Brahim
Doctoral Committee Chair(s):Mittra, Raj
Department / Program:Engineering, Electronics and Electrical
Discipline:Engineering, Electronics and Electrical
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Electronics and Electrical
Abstract:The spectral domain method is applied to four different problems involving microwave and millimeter-wave circuits. First, a general spectral domain formulation of the problem of electromagnetic coupling through apertures in a planar conducting screen is presented. This method is validated by analyzing resonant slots and comparing the results to previously published findings. Second, a class of slotted guiding structures is analyzed with a mixed spectral domain approach derived from the original aperture coupling formulation. The dispersion characteristics of several practical slotted structures are presented. Third, the discontinuity and radiation effects of a thin slot in the ground plane of a microstrip line are analyzed using the spectral domain approach. The scattering parameters of the slot are computed and compared to measured results. An equivalent circuit model of the slot discontinuity at low frequencies is also developed. Fourth, the spurious radiation and scattering from arbitrarily shaped microstrip etches are analyzed using the spectral domain method. A parametric study is carried out to identify the worst-case scenario for radiation.
Next, the numerical aspects of the implementation of the spectral domain technique are discussed. Algorithms for handling the numerical difficulties associated with the presence of singularities, oscillations and infinite integration limits are presented.
Finally, conclusions from the study are presented and suggestions and recommendations for future research topics are made.
Issue Date:1991
Rights Information:Copyright 1991 Kouki, Ammar Ben Brahim
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9210877
OCLC Identifier:(UMI)AAI9210877

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