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ANALYSIS OF FINITE PERIODIC DIELECTRIC GRAT INGS BY THE FINITEDIFFERENCE FREQUENCY DOMAIN METHOD WITH THE SUBENTIREDOMAIN BASIS FUNCTIONS AND WAVELETS
"... Abstract—In this paper, the finitedifference frequencydomain (FDFD) method, boundary integral equation (BIE) method and subentiredomain (SED) basis functions are combined to analyze scatterings from finite periodic dielectric gratings. The wavelet method is used to reduce the number of inner pro ..."
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Abstract—In this paper, the finitedifference frequencydomain (FDFD) method, boundary integral equation (BIE) method and subentiredomain (SED) basis functions are combined to analyze scatterings from finite periodic dielectric gratings. The wavelet method is used to reduce the number of inner product operations in calculating the mutualimpedance elements between the SED basis functions. In the numerical examples, the RCS curves obtained by the method in this paper are in good agreement with those obtained by the classical fulldomain FDFD method, but the computational times are largely reduced and no large matrix equation needs to be stored and solved in the former. 1.
Declaration
, 2010
"... By submitting this thesis electronically, I declare that the entirety of the work contained therein is my own, original work, that I am the owner of the copyright thereof (unless to the extent explicitly otherwise stated) and that I have not previously in its entirety or in part submitted it for obt ..."
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By submitting this thesis electronically, I declare that the entirety of the work contained therein is my own, original work, that I am the owner of the copyright thereof (unless to the extent explicitly otherwise stated) and that I have not previously in its entirety or in part submitted it for obtaining any qualification.
NONUNIQUENESS OF TCHARTS FOR SOLVING CC ITL PROBLEMS WITH PASSIVE CHARACTERISTIC IMPEDANCES
"... Abstract—Conjugately characteristicimpedance transmission lines (CCITLs) implemented by lossless periodic transmissionline structures have found various applications in microwave technology, and the Tchart was developed to perform the analysis and design of CCITLs effectively. Originally, the n ..."
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Abstract—Conjugately characteristicimpedance transmission lines (CCITLs) implemented by lossless periodic transmissionline structures have found various applications in microwave technology, and the Tchart was developed to perform the analysis and design of CCITLs effectively. Originally, the normalization factor used in defining normalized impedances of the Tchart is the geometric mean of characteristic impedances of CCITLs, which is not only one possible choice. By using other normalization factors based on characteristic impedances, different graphical representations can be obtained; i.e., Tcharts for CCITLs with passive characteristic impedances are not unique, and it depends on the associated normalization factor. In this study, three more possible normalization factors related to characteristic impedances of CCITLs are investigated. It is found that all Tcharts for each normalization factor are strongly dependent on the argument of characteristic impedances of CCITLs in a complicated fashion. The original Tchart based on the geometric mean of characteristic impedances is found to be the most convenient graphical representation for solving CCITL problems.