复合双层磁系统的雷达屏蔽实验
Radar shielding experiments by composite bilayer magnetic systems
AI总结：
本研究通过在消声室远场真实雷达条件下测试新型复合双层磁系统，发现其反射损耗从25dB增至35dB、吸收带宽扩展20%，为隐身材料设计提供新方向。
摘要：
在一组新型功能双层系统中，测量到反射损耗显著增加（从25 dB增至35 dB），吸收带宽扩展达20%。我们在消声室中于远场真实雷达条件下研究样品。每层由复合材料构成，通常为填充随机各向异性六方铁氧体和软金属材料（粉末或线材）的介电基质。将两种材料组合成亚毫米级双层结构，其微波吸收能力较单层吸收有前所未有的提升。改善屏蔽性能的能力与每层的介电常数、磁导率和厚度密切相关，从而可对隐身应用新型材料的设计进行有效控制。
英文摘要：
An experimental strong increase of the reflection loss (from 25 up to 35 dBs) and an extension of the absorption bandwidth up to 20% is measured in a set of novel functional bilayer systems. We focus our work on studying the samples in an anechoic chamber under far-field real radar conditions. Each layer consists of a composite material, typically a dielectric matrix filled with random anisotropy hexaferrite and soft metallic materials (powder or wires). Combining the two types of materials into a submillimetric bilayer structure has shown unprecedented improvements in microwave absorption capacities compared to the former absorption of each layer. The capacity to improve the shielding behavior is strongly related to each layer permittivity, permeability, and thickness leading, therefore, to a strong control over the design of novel materials for stealth applications.
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