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Computational electromagnetics

About: Computational electromagnetics is a research topic. Over the lifetime, 6412 publications have been published within this topic receiving 113727 citations. The topic is also known as: Electromagnetic field analysis.


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Journal ArticleDOI
TL;DR: An adaptive integration algorithm is presented for the computation of the Physical Optics (PO) electric and magnetic field scattered by electrically large objects modeled by Non-Uniform Rational B-Splines (NURBS).
Abstract: An adaptive integration algorithm is presented for the computation of the Physical Optics (PO) electric and magnetic field scattered by electrically large objects modeled by Non-Uniform Rational B-Splines (NURBS). The algorithm is the customization of a more general-purpose result that has been recently published. By using a unique formulation both impenetrable (e.g., impedance surfaces, coated conductors) as well as transparent thin sheet materials (e.g., thin dielectric panels, or frequency selective surfaces) are treated, via their Fresnel reflection and transmission coefficients. The PO radiation integral is evaluated over the NURBS parametric domain. Since most of the computer-aided geometric design (CAGD) tools are based on NURBS, the proposed algorithm allows a straightforward electromagnetic analysis of the structures by exploiting the standard available geometrical description, with no need of generating new geometrical models. Furthermore, the proposed adaptive sampling requires a number of integration points that is found to be drastically smaller than that resulting from standard Nyquist-based sampling integration algorithms. Such reduction of the sampling points is achieved by resorting to high-frequency technique concepts and allows a significant reduction of the CPU computational burden. Therefore the algorithm is efficient and particulary suitable for the electromagnetic characterization of real-life electrically large objects.

26 citations

Journal ArticleDOI
TL;DR: The commercially available software SolidWorks and custom-written software is used for accurately drawing complex shapes in conjunction with the electromagnetic software FEKO/spl trade/ to model the EM behavior of conformal antennas.
Abstract: The advantages of antennas that can resemble the shape of the body to which they are attached are obvious. However, electromagnetic modeling of such unusually shaped antennas can be difficult. In this paper, the commercially available software SolidWorks/spl trade/ is used for accurately drawing complex shapes in conjunction with the electromagnetic software FEKO/spl trade/ to model the EM behavior of conformal antennas. The application of SolidWorks and custom-written software allows all the required information that forms the analyzed structure to be automatically inserted into FEKO, and gives the user complete control over the antenna being modeled. This approach is illustrated by a number of simulation examples of single, wideband, multi-band planar and curved patch antennas.

26 citations

Journal ArticleDOI
TL;DR: In this article, the Percus-Yevick approximation (P-YA) of pair correlation function for hard spheres is combined with the T -matrix formulation to study the coherent wave attenuation of electromagnetic wave propagation in a discrete random medium.
Abstract: The Percus-Yevick approximation (P-YA) of pair correlation function for hard spheres is combined with the T -matrix formulation to study the coherent wave attenuation of electromagnetic wave propagation in a discrete random medium. The effect of the pair correlation function is seen to be significant at high fractional volumes of the discrete scatterers ( \geq0.125 ), but also depends on the frequency of the propagating wave-the effect being less at higher frequencies. The results are compared with previous calculations which employed the "well-stirred approximation" (WSA) for the pair correlation.

26 citations

Journal ArticleDOI
TL;DR: This paper describes the simulation of a microwave link from the transmitter to the receiver intermediate-frequency ports, by means of a rigorous circuit-level nonlinear analysis approach coupled with the electromagnetic characterization of the transmitter and receiver front-ends.
Abstract: This paper describes the simulation of a microwave link from the transmitter to the receiver intermediate-frequency ports, by means of a rigorous circuit-level nonlinear analysis approach coupled with the electromagnetic characterization of the transmitter and receiver front-ends. This includes a full electromagnetic computation of the radiated far field which is used to establish the connection between transmitter and receiver. Digitally modulated radio-frequency drive is treated by a modulation-oriented harmonic-balance method based on Krylov-subspace model-order reduction to allow the handling of large-size front-ends. An artificial neural network model is then developed to allow fast computation of the link driven by long sequences of the order of millions of samples. In this way, a meaningful evaluation of such link performance aspects as the bit-error rate becomes possible at the circuit level

26 citations

Journal ArticleDOI
TL;DR: In this paper, an exact integral equation solution to the wave propagation problem is used to transform the near-field data to the far field using two closed surfaces enclosing all sources and inhomogeneities.
Abstract: This paper presents a new approach to derive far-field data needed in antenna and EMI/EMC testing from near-field measurements. An exact integral equation solution to the wave propagation problem is used to transform the near-field data to the far field. The method requires near-field measurements on two closed surfaces enclosing all sources and inhomogeneities. The approach is validated with numerical simulation of measurements of fields radiated from a known antenna. >

25 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
2022101
2021153
202091
2019109
2018107