波导多路多工器的研究

发布时间：2018-09-03 14:52

【摘要】：毫米波的波长介于微波和光波之间,在雷达、卫星通讯、科学研究等众多领域均有广泛的应用前景,毫米波器件的研究已经成为了一个十分迫切的课题。其中,作为毫米波通信系统重要组成部件的多工器,其相关研究具有重要意义。随着工作频段往毫米波频段发展,由于器件尺寸与工作频率的共度效应,多工器的尺寸变得很小,使用传统的机械加工方法无法获得与低频段相同的表面光洁度。同时由于工作频率的升高,高频损耗增大,从而使多工器的插损大大增加。为了解决多工器在毫米波段工作时遇到的这些问题,使用矩形波导腔代替低频段采用的同轴腔结构。为了使多工器的插损尽量减小,采用集中管式多工器。卫星微波通信技术和无线移动通信技术的快速发展,使得微波通信频段变得异常拥挤。为了充分利用有限的频谱资源,邻接信道多工器被用于信道化设计。就集总管式多工器而言,邻接信道之间的相互影响很大,使得设计难度大大增加。为了减小信道之间的相互影响,采用单终端滤波器原型来设计信道滤波器。论文主要针对快速设计毫米波波导多工器和邻接信道波导多工器的方法进行研究。首先,根据信道邻接与否,选定单终端或双终端滤波器原型,并建立其集中参数电路模型并优化;然后,根据电路模型元件值建立三维模型并优化;最后,考虑温漂和公差的影响,作适当的预偏。由于参数众多,多工器的优化工作十分复杂。为了解决这一难题,通常采用模式匹配算法。这种算法具有速度快、精度高等优点。论文中的波导多工器是在基于模式匹配算法的电磁仿真软件中设计的。论文设计了Ka波段的集总管式四工器和V波段的双工器以及X波段的邻接信道波导八工器。
[Abstract]:The wavelength of millimeter wave lies between microwave and light wave. It has a wide application prospect in many fields such as radar, satellite communication, scientific research and so on. The research of millimeter wave device has become a very urgent subject. Among them, as an important component of millimeter wave communication system, its related research is of great significance. With the development of the working frequency band to the millimeter wave band, the size of the multiplexer becomes very small because of the effect of the device size and the working frequency, and the same surface finish as the low frequency band can not be obtained by using the traditional machining method. At the same time, the insertion loss of the multiplexer is greatly increased because of the increase of the operating frequency and the increase of the high frequency loss. In order to solve these problems in millimeter band multiplexer, rectangular waveguide cavity is used to replace the coaxial cavity structure in low frequency band. In order to minimize the insertion loss of the multiplexer, a centralized tube multiplexer is adopted. With the rapid development of satellite microwave communication technology and wireless mobile communication technology, the frequency band of microwave communication becomes extremely crowded. In order to make full use of limited spectrum resources, adjacent channel multiplexers are used in channelization design. For lumped-tube multiplexer, the interaction between adjacent channels is very strong, which makes the design more difficult. In order to reduce the interaction between channels, a single terminal filter prototype is used to design the channel filter. In this paper, the methods of fast design of millimeter wave waveguide multiplexer and adjacent channel waveguide multiplexer are studied. First of all, according to whether the channel is adjacent or not, the prototype of single-terminal or dual-terminal filter is selected, and its lumped parameter circuit model is established and optimized. Then, the three-dimensional model is established and optimized according to the component value of the circuit model. Take into account the effects of temperature drift and tolerance and make appropriate prebias. Because of many parameters, the optimization of multiplexer is very complicated. In order to solve this problem, pattern matching algorithm is usually used. This algorithm has the advantages of high speed and high precision. The waveguide multiplexer in this paper is designed in electromagnetic simulation software based on pattern matching algorithm. In this paper, the lumped tube quadruplexer, the V band duplex and the X band adjacent channel waveguide octet in Ka band are designed.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN928

【相似文献】