W波段平面化无源电路的设计

发布时间：2018-12-21 09:50

【摘要】：W波段收发组件是导引头中的重要组成部分，在精确制导中起着重要的作用。目前课题组已经设计实现的W波段收发组件中，无源电路都是以波导结构形式实现的，占用了较大的体积，使W波段系统应该具有的尺寸小的优势没有能够得到很好的体现。同时，波导结构不易于集成，也给系统的调试带来了不便。因此对W波段收发组件中的无源电路做平面化、小型化研究是十分必要的。另外，导引头对收发前端的重量、体积都有严格要求，采用平面化无源电路，可以大大减小组件的厚度、尺寸、重量，因此对无源电路进行平面化研究是十分有意义的。本文用基片集成波导（SIW）结构来实现W波段耦合谐振腔体滤波器。通过对电壁、磁壁对称性的分析，并结合建模仿真的方法提取耦合系数，实现耦合谐振腔带通滤波器的优化设计，并且通过负耦合结构，在上下边带都引入了传输零点，使滤波器具有更加陡峭的截止频率，提高了滤波器的频率选择性。用薄膜电路工艺来实现W波段微带Wilkinson功分器。薄膜电路工艺能够将薄膜电阻平面集成到电路中，，并且在毫米波频段也具有良好的稳定性，加工精度高。Wilkinson功分器结构简单易于实现，较普通T型功分器有更好的端口隔离特性。本文用奇偶模法进行分析设计，并用薄膜电路工艺加以制作，来实现W波段的微带Wilkinson功分器，得到良好的端口隔离度与输出幅度相位一致性。
[Abstract]:W-band transceiver module is an important part of seeker and plays an important role in precision guidance. At present, in the W-band transceiver module which has been designed and implemented by the research group, the passive circuit is realized in the form of waveguide structure, which occupies a large volume, so the advantages of the small size of the W-band system can not be well reflected. At the same time, the waveguide structure is not easy to integrate, which brings inconvenience to the debugging of the system. Therefore, it is necessary to study the planar and miniaturization of passive circuits in W band transceiver modules. In addition, the seeker has strict requirements for the weight and volume of the transceiver front end. Using the plane passive circuit can greatly reduce the thickness, size and weight of the module, so it is very meaningful to study the flatness of the passive circuit. In this paper, W band coupled resonator filter is realized by substrate integrated waveguide (SIW) structure. By analyzing the symmetry of electric wall and magnetic wall, and combining with modeling and simulation, the coupling coefficient is extracted to realize the optimal design of bandpass filter for coupling resonator, and the transmission zeros are introduced into the upper and lower sideband by negative coupling structure. The filter has more steep cutoff frequency, and the frequency selectivity of filter is improved. W band microstrip Wilkinson power divider is realized by thin film circuit technology. The thin film circuit process can integrate the film resistance plane into the circuit, and it also has good stability in millimeter wave frequency band and high machining accuracy. The structure of Wilkinson power divider is simple and easy to realize. Compared with ordinary T type power divider, it has better port isolation characteristics. In this paper, the odd-even mode method is used to analyze and design, and the thin film circuit is used to fabricate the W band microstrip Wilkinson power divider. The good port isolation and output amplitude phase consistency are obtained.
【学位授予单位】：北京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713

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