Radiated Near-Field Emission Extraction on 3d Curvilinear Surfaces From 2d Data

Abstract

Abstract-This paper deals with a fast and simple computational method of 3D near-field (NF) radiation from 2D planar frequency-and time-dependent data. The established calculation method can be used to predict the electromagnetic (EM) emission from various types of electronic devices. The proposed method is originally applicable to the computation of the EM NF along the arbitrary shaped curvilinear 3D surface of multi-shape objects. The EM computation consists in the application of the planar NF-to-NF transform using plane wave spectrum. The relevance of the established method is verified with three different validation tests of analytical and practical demonstrations. The first validation is based on the analytical NF radiation from set of elementary dipoles excited by a harmonic signal. The second validation test is based on the experimented data from a hybrid active printed circuit boards (PCBs) in the frequency domain. The last validation test is performed with the measured NF data from a microstrip planar circuit in the time-domain. For all the different test cases, the plots of EM NF on arbitrary curvilinear surfaces are presented. Applications with 3D visualization or holographic surface with arbitrary geometry of EM radiation from planar data in both frequency-and time-domains confirm the effectiveness of the proposed method to predict the EM NF emission from complex PCBs. The developed 2D-to-3D computational method is particularly useful for radiated EM compatibility engineering.

Formation of Radiation Fields of Linear Vibrator Arrays by Using Impedance Synthesis

“…The vibrator intrinsic impedance is supposed to be an arbitrary complex-valued function of the vibrator length. The initial integral equation of the problem satisfying a boundary condition on the vibrator surface S can be written as [4] 1…”

“…On the other hand, the problems of constructive synthesis are actual for issues of electromagnetic compatibility of electronic equipment. In that case, field profiles in the wave and near-field radiation zones are studied (see, for example, [3][4][5][6]). Complex structures containing several integrated circuits can often be modelled based on the use of dipole arrays.…”

“…The electromagnetic radiation in the near zone can be defined by using direct numerical methods developed for frequency-time domain. However, extrapolation of these methods to simulation of fields in the wave zone may encounter considerable difficulties [4].…”