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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Electromagnetic properties of polyurethane template-based carbon foams in Ka-band
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Electromagnetic properties of polyurethane template-based carbon foams in Ka-band

机译：Ka带中基于聚氨酯模板的碳泡沫的电磁性能

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摘要

The electromagnetic (EM) properties of polyurethane template-based reticulated carbon foams were investigated in the 26-37 GHz microwave frequency range (Ka-band). It was experimentally proved that carbon foams of a thickness of 2 mm and a density of 22-55 mg cm(-3) are almost not transparent to microwave radiation, and this is especially true for the densest ones. Depending on bulk density, the EM response of carbon foams in the microwave region can be mainly accounted for by either reflection or absorption. EM shielding efficiency of more dilute samples is due to absorption mechanisms, whereas denser foams provide up to 80% reflection of EM signals. EM properties of carbon foams in the Ka-band can be accurately predicted by a very simple model based on Fresnel formulae developed in this communication.
机译：在26-37 GHz微波频率范围（Ka波段）中研究了基于聚氨酯模板的网状碳泡沫的电磁（EM）性能。实验证明，厚度为2 mm且密度为22-55 mg cm（-3）的碳泡沫对微波辐射几乎是不透明的，对于最稠密的泡沫尤其如此。取决于堆积密度，微波区域中碳泡沫的EM响应主要可以通过反射或吸收来解释。较稀的样品的电磁屏蔽效率是由于吸收机理引起的，而较稠密的泡沫可提供高达80％的EM信号反射。通过基于此通讯中开发的菲涅耳公式的非常简单的模型，可以准确预测Ka波段中碳泡沫的EM特性。

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