超材料极化旋转特性在隐身天线罩中的设计及应用研究

With the rapid development of the anti-stealth technology, stealth performance of frequency selective surface radome and other relative components have been greatly challenged. The novel transmissive and polarization rotated frequency selective surface radome can solve this problem as the matematerial with polarization rotated property emerged. Around this subject, firstly, the mechanism of the novel radome will be investigated. The influence law between frequency selectivity of frequency selective surface and polarization rotated property will be explored. Secondly, the designing principle of the novel radome will be studied and various factors influencing the operating frequency, bandwidth, loss, polarization conversion ratio and incident angle stability will be deliberated. Thirdly, the key technology in the integrated design of novel radome will be investigated, to summarize the general method. Fourthly, we will furtherly study the conformal design method of the novle radome, and obtain the influence laws typical curve surface’s (hyperboloid, conical surfaces) impact on incident angle variation, insertion loss in the passband, and polarization conversion ratio out of band. Finally, with the aim of application, principle samples will be fabricated and tested to verify the fessibility and practicability of such intigrated frequency selective surface. This project will open a new route for designing stealth frequency selective surface radome. 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。而随着极化旋转特性超材料的出现，具有带内透波、带外极化旋转性能的新型一体化频率选择表面隐身天线罩能够解决上述难题。围绕这一主题研究该新型隐身天线罩的物理机制，探索频率选择表面的频选特性与超材料极化旋转特性间的影响规律；研究新型隐身天线罩的设计原理，阐明影响其工作频率、带宽、损耗、极化旋转效率、极化与角度稳定性的各种因素；研究新型隐身天线罩集成设计的关键技术，得出一般设计方法；研究新型隐身天线罩的共形设计方法，得到典型共形曲面（双曲面、圆锥面等）的阵子排布对入射角度变化、插入损耗、带外极化旋转效率等因素的影响规律。最后针对实际应用，加工制作原理器件并进行测试，验证其可行性和使用性。本项目为设计隐身天线罩开辟了一条新途径，既具有非常重要的科学意义也具有重要的工程应用价值。

本项目研究完成了超材料极化旋表面与频率选择表面的一体化设计。针对当前频率选择表面隐身天线罩的应用需求，提出了带内透波、带外极化旋转的超材料频率选择表面一体化设计的思想。设计了一在4.5GHz附近具有同极化波高透的二阶通带，在7-17GHz宽频范围内高效极化旋转反射的频率选择表面。设计了双带极化旋转反射，单带透波的极化旋转隐身天线罩，并且完成了具有带内透波、带外极化旋转性能的新型一体化频率选择表面隐身天线罩的设计及实验验证。具体来说研究该新型隐身天线罩的物理机制，探索频率选择表面的频选特性与超材料极化旋转特性间的影响规律；设计了一组大间隔双通带、紧凑型双通带频率选择表面，研究新型隐身天线罩的设计原理，阐明影响其工作频率、带宽、损耗、极化旋转效率、极化与角度稳定性的各种因素，设计完成了一组高选择性三通带；研究新型隐身天线罩集成设计的关键技术，得出一般设计方法。最后针对实际应用，分别设计了低通、高极化旋转反射隐身天线罩和带通、带外双带极化旋转隐身天线罩，加工制作原理器件并进行测试，验证其可行性和使用性。本项目为设计隐身天线罩开辟了一条新途径，既具有非常重要的科学意义也具有重要的工程应用价值。