微波滤波器及移相器无源电路的研究

发布时间：2018-11-20 15:43

【摘要】：相较于传统的右手材料,左手材料具有逆向或反向效应,支持后向波传播。由于它独特的负折射率、逆多普勒效应、亚波长衍射、逆切伦科夫辐射等电磁特性,使其具有广泛的应用前景,世界范围内左手材料的广泛研究也推动了尤其在微波器件中的相关应用。由于其介电系数和磁导率为负,能量与波矢量方向相反,所以具有左手定则。电磁带隙材料(包括电磁带隙结构(EBG)和缺陷地结构(DGS))是由光子晶体发展而来的,是由一种介质在另一种介质中周期性或非周期性排列组成的新型人工电磁材料,可控制等效介质的电磁波传播。其主要特点是,频率落在材料带隙内时,电磁波将无法传播,材料具有带阻、慢波、高阻抗、结构紧凑等特点,能更好的抑制谐波、提高效率,减小器件尺寸,具有广泛的应用前景。本文通过采用左手材料、缺陷地等新型结构,对几种新型高性能的滤波器和移相器等无源器件进行研究,以改善微波通信系统的性能。主要内容概括如下:针对实际工程应用以及现有微波器件的特点,充分利用新型人工电磁材料独特的电磁特性,从微波器件的设计理论出发,该新型人工电磁材料在微波器件中可用于各种系统。主要研究人工电磁材料对微波器件原有功能和结构的优化改善,研制人工电磁材料型微波器件试样,主要包括滤波器和移相器,工作频段在Ku波段内。通过采用新型人工电磁材料,进一步改善微波器件的性能,减小微波器件尺寸,并兼顾器件的电磁兼容性能,同时探索开发器件的新功能,促进微波器件进一步向小型化、集成化、高可靠性、高可控性方向发展。本论文总共设计了两款微波无源电路,从实验结果可以看出,他们的工作性能良好且具有明显的尺寸优势。因此,它的研究进一步表明,左手材料的使用,电磁带隙结构的设计对射频系统的小型化和集成化的微波无源电路具有重要意义。
[Abstract]:Compared with traditional right-handed materials, left-handed materials have reverse or reverse effects, supporting backward wave propagation. Because of its unique negative refractive index, inverse Doppler effect, subwavelength diffraction, inverse Cherenkov radiation and other electromagnetic characteristics, it has a wide application prospect. The extensive research of left-handed materials in the world has also promoted the related applications especially in microwave devices. Because the permittivity and permeability are negative and the energy is opposite to the wave vector, there is a left-handed rule. Electromagnetic band gap materials (including electromagnetic band gap structure (EBG) and defective ground structure (DGS) are developed from photonic crystals) are new artificial electromagnetic materials consisting of one medium arranged periodically or aperiorly in another medium. The electromagnetic wave propagation of the equivalent medium can be controlled. The main characteristic is that the electromagnetic wave will not propagate when the frequency falls in the bandgap of the material. The material has the characteristics of band resistance, slow wave, high impedance and compact structure, which can better suppress harmonics, improve efficiency, and reduce the size of the device. It has wide application prospect. In order to improve the performance of microwave communication system, several new passive devices, such as high performance filters and phase shifters, are studied by using left-handed materials, defects and other new structures. The main contents are summarized as follows: according to the practical engineering application and the characteristics of existing microwave devices, the unique electromagnetic characteristics of new artificial electromagnetic materials are fully utilized, and the design theory of microwave devices is introduced. The new artificial electromagnetic material can be used in various systems in microwave devices. This paper mainly studies the optimization and improvement of the original function and structure of microwave devices by artificial electromagnetic materials, and develops the samples of microwave devices based on artificial electromagnetic materials, which mainly include filters and phase shifters. The operating frequency band is in the Ku band. Through the use of new artificial electromagnetic materials, the performance of microwave devices is further improved, the size of microwave devices is reduced, and the electromagnetic compatibility performance of the devices is taken into account. At the same time, the new functions of the devices are explored to promote the further miniaturization of microwave devices. Integrated, high reliability, high controllability development direction. In this paper, two microwave passive circuits are designed. The experimental results show that they have good performance and obvious size advantage. Therefore, its research further indicates that the use of left-handed materials and the design of electromagnetic bandgap structure are of great significance to the miniaturization and integration of microwave passive circuits in RF systems.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713;TN623

【相似文献】