基片集成波导（SIW）双模带通滤波器三腔级联技术研究

发布时间：2018-05-31 04:06

本文选题：基片集成波导 + 双模谐振　；参考：《南京邮电大学》2015年硕士论文

【摘要】：传统的矩形波导虽然优点明显,例如电磁信号在波导内部传播时有很好的传输性能,有着较低的传输损耗,但是其不足之处在与波导结构往往尺寸比较大,不易和其他传输结构集成。这些劣势严重制约这两种传输线所构成滤波器的使用价值。在上世纪末,加拿大的学者和国内学者组共同提出了一种新的传输结构—基片集成波导。这种传输结构包含了上述两种传统结构的优势,场在波导内部的传输性能良好,波导内部的传输损耗小,以及便于和其他传输线集成等,这些优点使得其构建的滤波器适用于当前无线通讯技术要求。本论文首先分析电磁信号在SIW结构中场的传播特征,通过比较指出场在SIW和传统矩形波导中传播的异同点,接着是在参考矩形波导谐振腔的基础上,探讨SIW构成的谐振腔的腔体尺寸、谐振频率和腔体的Q值计算,然后讨论腔体间一些常规耦合方式,以及腔体和50欧姆传输线连接时的转换结构,再以上述理论分析为基础,完成腔体间的连接,获得性能良好的双模滤波器件。文中主要分为腔体共面和腔体异面两种情况分别进行探讨,使得级联后的滤波器在性能上有一定程度的提高,这一点主要体现在相对带宽上。文中使用的腔体级联主要有共面、异面级联,具体的级联方式分为:共面腔体使用了开窗、微带两种级联方式。异面腔体采用了探针、开缝级联。由于SIW腔体的高度一般是毫米级,这就使得腔体的异面级联对器件的大小影响有限,但是在平面上却能有效的减小器件面积,使得其和当代无线通信中器件小型化的趋势相吻合。
[Abstract]:Although the advantages of traditional rectangular waveguides are obvious, such as the good transmission performance and low transmission loss of electromagnetic signals propagating in the waveguide, the disadvantages of the traditional rectangular waveguides are that they are often larger in size than in the waveguide structure. Not easy to integrate with other transport structures. These disadvantages seriously restrict the use value of the filter formed by these two transmission lines. At the end of last century, Canadian scholars and domestic scholars jointly proposed a new transmission structure-substrate integrated waveguide. This kind of transmission structure includes the advantages of the two traditional structures mentioned above. The transmission performance of the field inside the waveguide is good, the transmission loss in the waveguide is small, and the integration with other transmission lines is convenient. These advantages make the constructed filter suitable for the current wireless communication technology requirements. In this paper, the propagation characteristics of electromagnetic signal in the field of SIW structure are analyzed firstly, and the similarities and differences between the field propagating in SIW and traditional rectangular waveguide are pointed out by comparison, and then on the basis of the reference rectangular waveguide resonator. The cavity size, resonant frequency and Q value of the cavity constructed by SIW are discussed. Then some conventional coupling modes between the cavity and the conversion structure between the cavity and the 50 ohmic transmission line are discussed. The theoretical analysis is based on the above theoretical analysis. The connection between cavities is completed, and a dual mode filter with good performance is obtained. In this paper, the two kinds of cases of cavity coplanar and cavity hetero-plane are discussed respectively, which makes the performance of the cascaded filter improve to some extent, which is mainly reflected in the relative bandwidth. In this paper, the cavity cascade is mainly coplanar and hetero-planar. The specific cascade methods are as follows: the coplanar cavity is windowed and the microstrip is cascaded. A probe is used in the cross-section cavity, and the slit is cascaded. Because the height of the SIW cavity is generally of millimeter order, this makes the cross-plane cascade of the cavity have a limited effect on the device size, but it can effectively reduce the device area in the plane. It coincides with the trend of miniaturization of devices in modern wireless communication.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.5

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