Temperature distribution analysis of /spl lambda//4 type EM-absorber using resistive film

2005 International Symposium on Electromagnetic Compatibility, 2005. EMC 2005. Pub Date : 2005-10-03 DOI:10.1109/ISEMC.2005.1513473

S. Watanabe, K. Iino, K. Saito, O. Hashimoto

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引用次数: 9

Abstract

This paper describes the temperature distribution analysis of lambda/4 type EM-absorber using resistive film when high electric power is injected to the absorber. For the temperature analysis, FDTD method is used to analyze electromagnetics and SIMPLE (semi-implicit method for pressure linked equations) method is used for calculation of heat transport and air convection enabling to analyze local heat transfer more strictly than heat transport equation (HTE) method which is the traditional heat transport analysis method. And we propose four types of wave absorbers to analyze these temperature distribution on the resistive film to find the best type with least temperature rise. As a result, when glass and metal plates are used for spacer and reflector, respectively, the absorber proved to be the best one from a view point of temperature descent. And it is shown that the temperature range does not cause the change of absorbing characteristics in the analysis but the temperature rise exceeds 160 degC, the characteristics may change

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/spl λ //4型电阻膜电磁吸收器温度分布分析

本文介绍了采用电阻膜的λ /4型电磁吸收器在注入高功率时的温度分布分析。对于温度分析，采用时域有限差分法进行电磁学分析，采用SIMPLE(半隐式压力方程法)方法计算热传递和空气对流，从而比传统的热传递分析方法热传递方程(HTE)方法更严格地分析局部热传递。并提出了四种吸波器，对其在电阻膜上的温度分布进行分析，找出温升最小的最佳吸波器。结果表明，从温度下降的角度来看，玻璃板和金属板分别用作间隔板和反射板时，吸收板是最好的。分析结果表明，温度范围不会引起吸波特性的变化，但温度升高超过160℃，吸波特性就会发生变化

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2005 International Symposium on Electromagnetic Compatibility, 2005. EMC 2005.

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