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Numerical Constructions of Testing Functions for Improving the Accuracy of MFIE and CFIE in Multi-Frequency Applications

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Figure

Figure 1.Two scattering problems that are considered in this study.A rectangular box with60 cm × 60 cm × 7.5 cm dimensions is investigated at around 500 MHz.A fishnet structure [9] isinvestigated at around 250 THz
Figure 2.Far-zone electric field scattered from the rectangular box obtained by using differentformulations and discretizations, as well as the corresponding iteration histories.GMRES is usedwithout restart and preconditioning.
Figure 3.Solutions of scattering problems involving the rectangular box.iteration counts are plotted with respect to frequency for different formulations of the problem.The relative error andNumerical testing functions for the designed MFIE-RWG+nRWG are obtained at 500 MHz.
Figure 4. Solutions of scattering problems involving the rectangular box in Fig. 1. The relative errorand iteration counts are plotted with respect to frequency for different formulations of the problem.Numerical testing functions for the designed MFIE-RWG+nRWG are obtained at 500 MHz.
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