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In this paper, one fast method for analyzing printed circuits based on matrix high-dimensional interpolation schemes has been presented. By virtual of the bi-interpolation on the plane of the frequency direction and the dielectric constant direction, the proposed method can greatly reduce the global time consuming of matrix fillings, and it can greatly improve the efficiency of multi-parameter scanning...
Traditional equivalent source reconstruction methods are only operating at a single frequency point each time. However, for wide band radiators, their computation cost of the source reconstruction increases linearly with the number of frequency points. In this paper, a wide-band equivalent source reconstruction method (WB-SRM) based on the Neville-type Stoer-Bulirsch (SB) algorithm is developed. Supported...
In this paper, the integral equation - fast Fourier transformation (IE-FFT) with grid-robust higher order vector basis functions is presented. The magnetic field integral equation (MFIE) is used for solving scattering from three-dimensional closed perfectly electric conductor (PEC). Conformal mesh is required for traditional basis function based on common edges between adjacent elements. This is very...
In this paper, we give a description of a software package LSLEP (lightning-caused surge level evaluation program). LSLEP can be used to evaluate the surges transferred from the power line into the house from a statistical perspective. The package mainly has three parts: 1) fast time-domain calculation of the lightning-caused electromagnetic field; 2) FDTD simulation of the whole low-voltage power...
In this paper, the distance between source and field points is divided into ultra-near field region, near field region and far field region for fast and accurately calculating the spatial Green's function. The spatial Green's functions within the three regions are respectively calculated by the Langrage interpolation scheme, the DCIM with surface wave poles being extracted and the SDP with leaky wave...
In modern NC machining, interpolation of spatial motion such as spatial arc and spiral line is significant. Based on the quaternion interpolation algorithm and S curve velocity planning, we have discovered a method which can be used to machine spatial arc and spiral line. This method uses the quaternion to describe the arc interpolation in three-dimensional space. The arc information is transformed...
In modern CNC machining, the interpolation of complex profile curve with high speed and high accuracy is required. Based on B spline curve theory, a revised algorithm of cubic B spline curve interpolation is presented in the paper. This proposed algorithm gives a new method which is based on pre-judgment of machining feedrate to calculate the tangent vectors of spline curve junction. The tangential...
Expressing the traveling wave phase dependency, the use of PE bases is able to reduce the number of unknowns dramatically, and lead to the sparsification of the impedance matrix, which will be reported in our other paper. Secondly, the PE bases cause better condition number and faster convergence rate in iteration solution because of showing intrinsic property of the induced current. Thirdly, the...
In the field of computational electromagnetics, wide band response from PEC targets attracts much attention from researchers. Traditionally, frequency domain methods have to calculate the responses frequency by frequency to obtain the wide band response. It definitely limits the application of such kind of methods.
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