吸、透波一体化频率选择表面的集成设计及应用研究

With the rapid development of the anti-stealth technology, stealth performance of the frequency selective surface radome and other relative components have been greatly challenged. The emerging absorptive and transmissive frequency selective surfaces can resolve this problem. With this aim, the mechanism of the absorptive and transmissive frequency selective surfaces will be firstly investigated. Various factors influencing the resonant frequency, bandwidth, dispertion, and loss will be deliberated. Secondly, the key technology in the integrated design of absorptive and transmissive frequency selective surfaces will be investigated, and the general method will be summarized. Thirdly, we will study the conformal design of the absorptive and transmissive frequency selective surfaces, and obtain the influence laws of the typical curve surfaces's (hyperboloid, conical surfaces) impact on various incident angles, insertion losses in the passband, out-of-band depression, and stability of central frequencies. Fourthly, the control of insertion losses will be investigated, and the various factors that impact the absorptive and transmissive frequency selective surfaces' insertion losses will be obtained. Finally, with the aim of practical applications, proof-of-principle samples will be fabricated and measured to verify the feasibility and practicability of such frequency selective surfaces. This project will open a new route to developing all sorts of absorptive and transmissive frequency selective surfaces. This is of very important scientific significance and important engineering application values.

反隐身技术的迅速发展使频率选择表面雷达天线罩等器件的隐身性能面临着严峻挑战。而新兴的具有吸、透波功能的一体化频率选择表面能够解决上述难题。围绕这一主题研究吸、透波一体化频率选择表面的物理机制，阐明影响其谐振频率、带宽、色散与损耗的各种因素；研究吸、透波一体化频率选择表面集成设计的关键技术，得到一般设计方法；研究吸、透波一体化频率选择表面的共形设计，得到典型共形曲面（双曲面、圆锥面等）的阵子排布对入射角变化、通带内插入损耗、带外抑制度以及中心频率稳定性的影响规律。研究插入损耗的控制，得到影响吸、透波一体化频率选择表面插入损耗的各种因素，提出调控方法；最后针对实际应用，加工制作原理器件并进行测试，验证该频率选择表面的可行性和实用性。本项目将为发展出各种功用的吸、透波一体化新型频率选择表面开辟新途径，这不仅具有非常重要的科学意义，也具有重要的工程应用价值。

反隐身技术的迅速发展使频率选择表面雷达天线罩等器件的隐身性能面临着严峻挑战。而新型的具有吸、透波功能的一体化频率选择表面能够解决上述难题。项目围绕吸波材料作为核心组元引入到频率选择表面的设计中来实现吸、透波功能一体化，首先基于等效介质理论建立了吸、透波功能的一体化频率选择表面仿真模型，提出通过吸波材料吸收频段与频率选择表面阻带的吻合来设计带通型频率选择表面的带外吸波特性，进一步提出了基于加载吸波材料设计的吸、透波功能的一体化频率选择表面设计理论；在此基础上，设计并试验验证了基于电磁谐振的极化无关且具有低频透射和高频吸收特性的超材料吸波体；开展了基于磁性吸波材料的吸、透波一体化频率选择表面设计，提出了具有低频透射和高频宽带吸收特性的超材料吸波体。新型的吸、透波一体化频率选择表面可以实现带外吸收及栅瓣抑制，在隐身技术中具有重要的应用前景。