频率选择表面宽带吸波体的参数化设计与优化
发布时间：2018-10-30 10:30
【摘要】：频率选择表面(FSS)吸波体作为一种重要的新型结构型吸波材料,具有广阔的应用前景。系统的设计与优化方法对于推动FSS宽带吸波体的发展具有重要意义。本文研究了FSS吸波体的吸波机理及其模型的参数化方法,讨论了FSS宽带吸波体的性能评价方法、分析方法及其优化框架。通过建立合理的参数化模型,使用合适的评价与分析方法,针对单元图案、结构排布等不同的侧重点,优化设计了多种FSS宽带吸波体。论文主要研究工作如下： 从谐振、阻抗匹配等角度讨论了FSS吸波体的吸波原理,以传输线模型为基础定性分析了影响FSS吸波体谐振与阻抗匹配状态的各种要素,以此为基础提出FSS吸波体的模型参数化方法。FSS的单元图案尺寸、器件以及结构等均可以使用此方法参数化。 根据FSS宽带吸波体的性能特点,讨论并提出了能够有效评价其宽带吸收性能的评价方法,以评价函数为基础提出了FSS宽带吸波体的二维解空间描述方法。基于FSS宽带吸波体的参数化模型,有针对性地梳理与改进遗传算法在FSS优化中的应用。最后以设计、评价、分析、优化等为基础构建FSS宽带吸波体的智能优化框架。 研究与设计了一种4-8GHz开关切换式FSS宽带吸波体。侧重图案参数,对开关性能进行设计与优化。以双开口环耦合图案为基础,设计具有双谐振特性的可调单元结构。提出多态联合评价遗传算法(PUE-GA)对其开关特性进行评价与优化。最终实现了OFF状态-10dB吸收、ON状态全反射的开关切换式FSS宽带吸波体。 研究与设计了一种1-5GHz超宽带连续可调式FSS宽带吸波体。侧重图案参数,对连续可调吸波性能进行设计与优化。以一种简单谐振单元为基础,优化与设计具有多谐振特性的单元图案,并在此基础上设计提出具有渐变边缘的多谐振单元图案。通过设计合理的可调器件加载和激励方式,赋予FSS吸波体双可调自由度,从而充分发挥出渐变边缘图案的多谐振特性。最终实现了1-5GHz范围-10dB宽带可调吸波性能。 研究与设计了一种具有极化无关性能的1-8GHz超宽带连续可调式FSS吸波体。侧重图案参数与结构层厚度,对连续可调吸波性能进行设计与优化。基于渐变边缘图案的设计思路,在保持可调性以及吸波性能的同时,通过简化、改进得到具有极化无关特性的基础图案。使用PUE-GA进行性能优化后,结合可调器件激励方法,最终在1-8GHz超宽带范围实现了极化无关性能与-10dB吸收性能。 研究与设计了一种具有极化无关性能的1-8GHz超宽带多层结构无源FSS宽带吸波体。侧重图案参数与结构参数,对不可调宽带吸波性能进行设计与优化。通过放开两层图案加载层与电介质基底层的排列形式,搜索更适于1-8GHz超宽带吸波的构型。使用“设计-全局优化-分析-局部优化”的优化框架,对多层结构FSS宽带吸波体的性能进行优化。最终得到在1-8GHz具有-10dB吸收性能和极化无关性能的多层结构无源FSS宽带吸波体。 本文的研究说明,所提出的模型参数化方法以及设计、评价、分析和优化方法能用于有源和无源FSS宽带吸波体的设计与优化。所得到的多种FSS宽带吸波体在其目标频段均具有良好性能。这些研究将为隐身技术领域的应用奠定基础。
[Abstract]:Frequency selective surface (FSS) wave absorbing body, as an important new type of structure type wave absorbing material, has wide application prospect. The design and optimization of the system is of great significance to promote the development of FSS broadband wave-absorbing body. This paper studies the wave absorbing mechanism of FSS wave absorbing body and the parametric method of its model, and discusses the performance evaluation method, analysis method and optimization framework of FSS broadband wave absorbing body. Through establishing reasonable parametric model, using appropriate evaluation and analysis method, aiming at different emphasis of unit pattern, structure arrangement and so on, a variety of FSS broadband wave absorbing bodies are optimized. The main work of the thesis is as follows: The wave absorbing principle of FSS wave absorbing body is discussed from the angle of resonance and impedance matching, and the resonance and impedance matching state of FSS wave absorbing body are qualitatively analyzed based on the transmission line model. The model parametrization of FSS wave absorbing body is put forward on the basis of this. Methods: The unit pattern size, device and structure of FSS can be used in this method. Based on the performance characteristics of FSS broadband wave-absorbing body, the evaluation method of the broadband absorption performance of FSS is discussed and put forward, and the two-dimensional solution of FSS broadband wave-absorbing body is proposed based on the evaluation function. In this paper, based on the parametric model of FSS broadband wave-absorbing body, the improved genetic algorithm based on the parametric model of FSS broadband wave-absorbing body is proposed in this paper. Application of FSS broadband wave-absorbing body based on design, evaluation, analysis and optimization Can optimize the framework. Research and design a 4-8GHz switch switching type FSS broadband wave-absorbing body, focusing on pattern parameters, switching properties The design and optimization can be carried out. Based on the double-open loop coupling pattern, the design has a double resonance. In this paper, a multi-state joint evaluation genetic algorithm (PUE-GA) is proposed for its switch. Evaluation and optimization are carried out. In the end, the switching mode of OFF state-10dB absorption and ON state total reflection is realized. FSS broadband wave-absorbing body. A 1-5GHz ultra-wide band continuum is designed and designed. Adjustable FSS broadband wave absorbing body, focusing on pattern parameters, continuous adjustable The design and optimization of the wave absorbing performance are designed and optimized based on a simple resonance unit, and the unit pattern with multi-resonant characteristics is optimized and designed, and the design is given. By designing reasonable adjustable device loading and excitation mode, the FSS wave absorbing body can be endowed with two adjustable degrees of freedom so as to give full play to the taper. Multi-resonant characteristic of variable-edge pattern. 1-5GHz range is finally realized-1 0dB broadband adjustable wave absorption performance. A 1-8GHz with polarization independent performance is studied and designed. Ultra-wide band continuous adjustable FSS wave absorbing body, focusing on the pattern parameters and thickness of the structure layer, and Design and optimization of continuous adjustable suction wave performance. Based on the design idea of gradual edge pattern, it can be improved through simplification and improvement while maintaining adjustability and wave absorption performance. When the PUE-GA is used for performance optimization, the polarization is finally realized in the 1-8GHz ultra wide band range after the performance optimization is performed using the PUE-GA. Independent performance and-10dB absorption performance. A 1-8GHz with polarization-independent performance was studied and designed The invention discloses an ultra-wideband multilayer structure non-source FSS broadband wave absorption body, The design and optimization of the non-adjustable broadband wave absorption performance are carried out. The arrangement forms of the two layers of pattern loading layer and the dielectric substrate layer are released, more suitable for the configuration of 1-8ghz ultra-wideband suction waves, multi-layer using an optimized framework of 鈥淒esign-Global Optimization-Analysis-Locally Optimized鈥，
本文编号：2299750
[Abstract]:Frequency selective surface (FSS) wave absorbing body, as an important new type of structure type wave absorbing material, has wide application prospect. The design and optimization of the system is of great significance to promote the development of FSS broadband wave-absorbing body. This paper studies the wave absorbing mechanism of FSS wave absorbing body and the parametric method of its model, and discusses the performance evaluation method, analysis method and optimization framework of FSS broadband wave absorbing body. Through establishing reasonable parametric model, using appropriate evaluation and analysis method, aiming at different emphasis of unit pattern, structure arrangement and so on, a variety of FSS broadband wave absorbing bodies are optimized. The main work of the thesis is as follows: The wave absorbing principle of FSS wave absorbing body is discussed from the angle of resonance and impedance matching, and the resonance and impedance matching state of FSS wave absorbing body are qualitatively analyzed based on the transmission line model. The model parametrization of FSS wave absorbing body is put forward on the basis of this. Methods: The unit pattern size, device and structure of FSS can be used in this method. Based on the performance characteristics of FSS broadband wave-absorbing body, the evaluation method of the broadband absorption performance of FSS is discussed and put forward, and the two-dimensional solution of FSS broadband wave-absorbing body is proposed based on the evaluation function. In this paper, based on the parametric model of FSS broadband wave-absorbing body, the improved genetic algorithm based on the parametric model of FSS broadband wave-absorbing body is proposed in this paper. Application of FSS broadband wave-absorbing body based on design, evaluation, analysis and optimization Can optimize the framework. Research and design a 4-8GHz switch switching type FSS broadband wave-absorbing body, focusing on pattern parameters, switching properties The design and optimization can be carried out. Based on the double-open loop coupling pattern, the design has a double resonance. In this paper, a multi-state joint evaluation genetic algorithm (PUE-GA) is proposed for its switch. Evaluation and optimization are carried out. In the end, the switching mode of OFF state-10dB absorption and ON state total reflection is realized. FSS broadband wave-absorbing body. A 1-5GHz ultra-wide band continuum is designed and designed. Adjustable FSS broadband wave absorbing body, focusing on pattern parameters, continuous adjustable The design and optimization of the wave absorbing performance are designed and optimized based on a simple resonance unit, and the unit pattern with multi-resonant characteristics is optimized and designed, and the design is given. By designing reasonable adjustable device loading and excitation mode, the FSS wave absorbing body can be endowed with two adjustable degrees of freedom so as to give full play to the taper. Multi-resonant characteristic of variable-edge pattern. 1-5GHz range is finally realized-1 0dB broadband adjustable wave absorption performance. A 1-8GHz with polarization independent performance is studied and designed. Ultra-wide band continuous adjustable FSS wave absorbing body, focusing on the pattern parameters and thickness of the structure layer, and Design and optimization of continuous adjustable suction wave performance. Based on the design idea of gradual edge pattern, it can be improved through simplification and improvement while maintaining adjustability and wave absorption performance. When the PUE-GA is used for performance optimization, the polarization is finally realized in the 1-8GHz ultra wide band range after the performance optimization is performed using the PUE-GA. Independent performance and-10dB absorption performance. A 1-8GHz with polarization-independent performance was studied and designed The invention discloses an ultra-wideband multilayer structure non-source FSS broadband wave absorption body, The design and optimization of the non-adjustable broadband wave absorption performance are carried out. The arrangement forms of the two layers of pattern loading layer and the dielectric substrate layer are released, more suitable for the configuration of 1-8ghz ultra-wideband suction waves, multi-layer using an optimized framework of 鈥淒esign-Global Optimization-Analysis-Locally Optimized鈥，
本文编号：2299750
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