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Numerical approach to frequency response problems usually requires that the system governing equation is solved repeatedly at many frequencies. The computational efficiency of the overall process can be increased by departing from traditional sequential computing model in favor of utilizing the parallel processing capability commonly offered by modern hardware. In this paper, we consider a hybrid...
In this paper, a simple adaptive frequency sampling scheme employing interval bisection combined with the Cauchy method implemented through Stoer-Bulirsch algorithm is examined as a tool for generating broadband shielding behavior of wire-grid cages from “rigorous” electromagnetic simulation based on the method-of-moments. The approach offers fast and accurate frequency-sweep calculations and a possibility...
A simple adaptive frequency sampling scheme employing interval bisection combined with the Cauchy method implemented through Stöer-Bulirsch algorithm is examined as a tool for interpolating wideband system responses from numerical electromagnetic (EM) simulation. Emphasis is placed on examining the convergence of the method. Numerical experiments show that reliable interpolation can be done at substantially...
In this paper, a CUDA-enabled GPU accelerated implementation of Method of Moments (MoM) for solving scattering and radiation electromagnetic problems is presented. The solution is based on the frequency-domain Electric Field Integral Equation (EFIE) formulation for arbitrary configuration of conducting bodies and wires. The CUDA environment is employed to port a single-CPU sequential code to the parallel...
In this paper, a hybrid technique combining the FDTD method and Physical Optics (PO) approximation is presented as a tool for analysis of planar antennas radiating in the presence of electrically large conductive structures. The surface equivalence theorem is used to interface the FDTD and PO subdomains and establish equivalent current sources. To increase computational efficiency of the proposed...
This communication introduces a CUDA-enabled GPU accelerated technique for broadband analysis of arbitrary 3D conducting body-wire radiating/scattering structure. The solution is based on the integral equation dis-cretized by the method of moments (MoM) with the use of RWG-type basis functions. Wide-band data are generated from MoM simulation employing an adaptive frequency sampling of the observed...
The paper briefly describes a full-wave frequency-domain (FD) approach aimed at developing a SPICE-equivalent circuit model for predicting the effects of coupling of external electromagnetic fields to transmission lines (TLs). The approach employs the method of moments combined with rational approximation of the desired observable, and vector fitting technique. A Norton equivalent circuit representing...
This communication presents preliminary results of examining a full-wave approach based upon the method-of-moments combined with an adaptive frequency sampling and Stoer-Bulirsch rational approximation algorithm as a tool for a wideband frequency-domain transient analysis of a multiconductor transmission line driven by a lumped voltage source and simultaneously exposed to external electromagnetic...
This paper outlines and examines a technique for constructing rational macromodels improving computational efficiency of MoM-based wide-band electromagnetic simulations. The approach combines the Neville-type Stoer-Bulirsch (SB) rational interpolation algorithm with adaptive-frequency-sampling (AFS) technique and vector fitting (VF).
Asymptotic waveform evaluation technique and the Neville-type Stoer-Bulirsch algorithm are investigated and compared as the tools for efficient performance evaluation of antennas with emphasis placed on their input impedance over a wide frequency band. Numerical results are given for a helical antenna with a truncated-cone reflector.
This paper briefly introduces the MoM-based computationally efficient technique combining the domain decomposition and Z matrix interpolation supported by an adaptive frequency sampling for the wide-band performance evaluation of antennas/scatterers. Numerical examples demonstrate the usefulness and effectiveness of the technique and the offered saving in terms of both CPU time and memory storage...
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