ODU用V-Band波导环行器的研制

发布时间：2018-03-28 12:29

本文选题：铁氧体　切入点：V波段　出处：《东南大学》2017年硕士论文

【摘要】：铁氧体环行器是现代通讯系统中的重要元件。自上个世纪50年代提出以来,在工程技术上,人们制作了各种类型的环行器,广泛地应用于雷达、卫星、移动通信基站中。波导环行器的发明,使通信频段成功地拓展到微波,毫米波领域,极大地提高了通信带宽。本文先从铁氧体特性入手分析了电磁波在铁氧体中的传输特性,分析了带线环行器的工作原理,得出器件的环行条件。分析了波导环行器的结构特征,提出了一种拓宽波导环行器带宽的阻抗匹配机制,利用有限元电磁分析工具Ansys HFSS结合Maxwell磁场分析工具,精确仿真优化波导环行器性能,大大降低了波导环行器的设计周期。依据环行器原理设计了 V波段波导环行器的大致结构,通过优化取得结构参数。在精密加工的辅助下,成功制得V波段环行器,器件已成功运用于客户的ODU系统中。运用此方法设计的V波段、E波段波导隔离器亦已取得成功。对更高频率的器件,其设计亦具有借鉴意义。
[Abstract]:Ferrite circulator is an important component in modern communication system. Since it was put forward in 1950s, people have made various kinds of circulators in engineering technology, which are widely used in radar and satellite. With the invention of waveguide circulator in mobile communication base station, the communication frequency band has been successfully extended to the field of microwave and millimeter wave, and the communication bandwidth has been greatly increased. In this paper, the transmission characteristics of electromagnetic wave in ferrite are analyzed from the point of view of ferrite characteristics. In this paper, the working principle of the waveguide circulator is analyzed, and the loop conditions of the device are obtained. The structure characteristics of the waveguide circulator are analyzed, and an impedance matching mechanism to widen the bandwidth of the waveguide circulator is proposed. Using finite element electromagnetic analysis tool Ansys HFSS and Maxwell magnetic field analysis tool, the performance of waveguide circulator is simulated and optimized accurately. The design period of the waveguide circulator is greatly reduced. According to the principle of the circulator, the approximate structure of the V-band waveguide circulator is designed, and the structural parameters are obtained by optimizing the structure parameters. Under the assistance of precision machining, the V-band circulator is successfully fabricated. The device has been successfully applied to the customer's ODU system and the V-band E-band waveguide isolator has been successfully designed. It is also useful for the design of higher frequency devices.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN621

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