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Two composite symmetry structure is proposed in this paper. Based on the integral equation method, the frequency response with large incident angle effect is analyzed. As a result of the numerical analysis, it is shown that the composite symmetry structure with single FSS screen is efficient to stabilize the drift of FSS resonant frequency with the steering of incident angle though transmission loss...
The exact model of an antenna array with a dielectric radome is established by using the surface integral equations and method of moments (SIE-MoM). The proper preconditioning techniques (PT) and the fast multipole method are employed, which obviously improves the property of the MoM matrix equation, reduces the memory occupation and accelerate the iteration convergence of the conjugate gradient (CG)...
An hybrid method based on time domain integral equation (TDIE) coupled with physical optics (PO) is presented for the transient analysis of electrically large conducting objects. The matrix equation of marching-on in time (MOT) procedure is deduced. The numerical results demonstrate the validity and efficiency of the presented method.
In this paper, mixed potential electric integral equation (MPIE) and the method of moments (MOM) are used to analyze the horizontal log-periodic dipole antenna (LPDA) array over ground plane. The microwave network theory is applied to deal with the excitation. The direct discrete complex image method (DCIM) and a quick way are applied to calculate the Sommerfeld integral in the near and far region...
Many new features have been included in the latest release of the electromagnetic simulation package FEKO suite 5.4 from July 2008. This paper aims at giving an overview of the major new features added to the computational kernel, which are: Modelling of periodic boundary conditions for 1-D and 2-D periodic structures, the inclusion of waveguide port excitations within the MoM/PO hybrid method, the...
A coupled surface-volume integral equation approach is presented for analysis of arbitrarily shaped microstrip antennas on finite ground substrate. The method is more universal than traditional MoM. The basis functions defined in pairs of tetrahedral volume elements (SWG) and on pairs of triangular patches (RWG) are used to represent the unknown currents in dielectric cells and on conductive patches...
The time-domain electric, magnetic and combined field integral equations (TDEFIE, TDMFIE and TDCFIE) have been applied widely to the analysis of transient scattering from targets. In this paper, a surface integral equation (TDCFIE) approach is utilized to calculate the transient scattering from arbitrarily shaped, three-dimensional dielectric bodies. In conjunction with the marching-on-in-time method,...
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