An update on the design and synthesis of compact absorber for EMC chamber applications

Proceedings of IEEE Symposium on Electromagnetic Compatibility Pub Date : 1994-08-22 DOI:10.1109/ISEMC.1994.385623

T. Ellam

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引用次数: 15

Abstract

The paper describes and presents design parameters and methods for the synthesis of broadband "hybrid" absorbers using ferrite tiles and multilayered, carbon-loaded, dielectric materials. Measured data are compared with predicted values of reflectivity for prototype and production absorbers. Normalized site attenuation results are presented demonstrating improved performance for radiated emissions per ANSI C63.4. The original development effort [Ellam, 1994] included a survey of ferrite absorbers, design and construction of specialized test fixtures, computer modeling of basic and complex absorber structures, measurement of bulk dielectric parameters such (permittivity/permeability), examination of production and economic constraints, and measurement of new absorbers in EMC semi-anechoic chambers. The present follow-on paper is limited to a brief overview of the of previous survey results, new computer modeling of absorber structures and the design tradeoffs involved in the design of a broadband hybrid EMC absorber. Hybrid absorber designs ranging from 0.41 m to 1.5 m thick were investigated.<>

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用于电磁兼容腔室的紧凑型吸收器的设计和合成的最新进展

本文描述并介绍了利用铁氧体瓦和多层载碳介质材料合成宽带“混合”吸收体的设计参数和方法。测量数据与原型和生产吸收器的反射率预测值进行了比较。标准化的站点衰减结果展示了根据ANSI C63.4改进的辐射发射性能。最初的开发工作[Ellam, 1994]包括铁氧体吸收器的调查，专业测试夹具的设计和建造，基本和复杂吸收器结构的计算机建模，体介电参数(介电常数/磁导率)的测量，生产和经济约束的检查，以及EMC半消声室中新吸收器的测量。目前的后续论文仅限于简要概述以前的调查结果，吸收器结构的新计算机建模以及宽带混合电磁兼容吸收器设计中涉及的设计权衡。研究了厚度从0.41 m到1.5 m的混合吸收器设计

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Proceedings of IEEE Symposium on Electromagnetic Compatibility

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