EMI/EMC Analysis of Printed Circuit Boards Subject to Near-Zone Illuminations

• Published in: IEEE transactions on electromagnetic compatibility Vol. 51; no. 2; pp. 406 - 408
• Main Authors: Khan, Z., Bayram, Y., Volakis, J.L.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Applied sciences; Boards; Couplings; Discrete Fourier transforms; Electromagnetic compatibility; Electromagnetic compatibility (EMC); Electromagnetic interference; electromagnetic interference (EMI); Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronic systems; Electronics; Exact sciences and technology; Excitation; Excitation spectra; Fourier transforms; Illumination; Information, signal and communications theory; Lighting; scattering parameters; Telecommunications and information theory; Transmission line matrix methods; Generalized function; Discrete Fourier transformation; Printed circuit board; Electromagnetic compatibility; electromagnetic interference (EMI); Electromagnetic disturbance; Transmission line; Electromagnetic compatibility (EMC); Electromagnetic interference; s parameter; Electronic component; A priori estimation; S matrix; Plane wave; Illumination; Matrix method; Hybrid model; scattering parameters; Printed circuit; Transmission mode
• ISSN: 0018-9375; 1558-187X
• DOI: 10.1109/TEMC.2009.2013714

Previously, we proposed a hybrid S -matrix approach for general electromagnetic interference/electromagnetic compatibility (EMI/EMC) analysis of electronic systems. However, that approach was limited to plane wave excitations. In this short paper, we propose a generalization of the hybrid S -matrix approach to near-zone excitations. Such excitations lead to a continuous spectrum of forced modes that are not readily decomposed using the generalized pencil of function method. Herewith, we employ the discrete Fourier transform, with a priori knowledge of the natural transmission line modes, to extract the coefficients of all dominant spectral components. These are subsequently used to generate the hybrid S -matrix entries under near-zone EMI illuminations.