Simulation Methodology for the Assessment of Field Uniformity in a Large Anechoic Chamber

• Published in: IEEE transactions on magnetics Vol. 50; no. 2; pp. 213 - 216
• Main Authors: Munteanu, Irina, Kakerow, Ralf
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.02.2014; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Anechoic chambers; Computational modeling; Cross-disciplinary physics: materials science; rheology; electromagnetic analysis; Electromagnetic compatibility; Exact sciences and technology; immunity testing; Impedance; Magnetism; Materials; Materials science; Other topics in materials science; Physics; Solid modeling; Surface impedance; time domain analysis; Anechoic chambers; Electromagnetism; immunity testing; Simulation; electromagnetic analysis; Electromagnetic compatibility; time domain analysis; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2013.2283154

The paper presents a simulation methodology for assessing the properties of a generic anechoic chamber, taking into account wall and floor coatings, measurement table, and antenna. Unlike previous approaches, the absorbing walls of the chamber are modeled as infinitely thin sheets. This leads to considerable improvement of the simulation performance. To this aim, a technique for extracting equivalent surface impedance material parameters from wall reflectivity measurements is presented. The large electrical size of the problem, its multiscale character, given by the large dimensions of a typical chamber on one hand and the fine details of the antenna on the other hand, and the complicated material parameters represent the challenges of such a simulation.