Yüksek ve alçak elektromanyetik saçınım sonuçlarının matris kalem yöntemi ile birleştirilerek dış değerlemesi

Accurate frequency domain solutions of electromagnetic scattering problems areknown to require high computing resources as the solution frequency increases.On the other hand, high-frequency techniques provide us solutions with limitedaccuracy in the relatively high-frequency regions. In this thesis we aimed to fillthe intermediate gap by using extrapolation techniques. Matrix pencil method(MPM) is presented to find the parameters of the model in our model-based ex-trapolation approach. In order to fully incorporate the two separate availabledata sources, i.e., accurate low-frequency solvers and asymptotic high-frequencysolvers, we proposed two methods of coupling, namely coupled MPM and cou-pled deconvolution MPM. Results of proposed extrapolation methods are testedboth on analytically generated backscattering solution of conducting sphere andnumerical solutions of various three dimensional bodies.Keywords: Extrapolation, Matrix pencil method, Coupled extrapolation, RCS,COMPM, CDMPM.iv