基于SIW四阶交叉耦合滤波器快速设计  

Fast Design of Fourth-order Cross-Coupling Filter Based On SIW

作　　者：吴章敏 包晓军 刘远曦 李琳 WU Zhang-min;BAO Xiao-jun;LIU Yuan-xi;LI Lin(Naruida Technology Ltd.,Zhuhai,519000,China)

机构地区：[1]珠海纳睿达科技有限公司,珠海519000

出　　处：《无线通信技术》2020年第4期15-18,24,共5页Wireless Communication Technology

基　　金：广东省引进创新创业团队项目资助(2016ZT06G579)。

摘　　要：基片集成波导(substrate integrated waveguide,SIW)是一种具有传输损耗低、高品质因数的新型平面波导结构。本文建立了SIW滤波器的等效电路模型,采用LCR并联谐振器代表SIW谐振腔,阻抗变换器代表耦合窗口,通过电路仿真优化可获得理想的耦合矩阵与各个谐振腔的谐振频率,使用电磁仿真软件对分析模型进行全波仿真获得S参数,提取其耦合系数和谐振频率参数与理想参数相对比,就可以得到SIW滤波器各个参数的优化方向。作为应用实例,本文对X波段四阶交叉耦合带通滤波器进行了快速设计,通过实测结果与仿真结果对比有较好的一致性,证明了本文所提出方法的可行性。Substrate integrated waveguide(SIW) is a new type of planar waveguide structure with low transmission loss and high quality factor. In this paper, an equivalent circuit model of the SIW filter is established. The LCR parallel resonator is used to represent the SIW resonant cavity and the impedance converter is to represent the coupling window. The ideal coupling matrix and the resonant frequency of each resonant cavity can be obtained through circuit simulation and optimization. Use electromagnetic simulation software to perform full wave simulation on the analysis model to obtain S parameters, extract the coupling coefficient and resonance frequency parameters and compare them with the ideal parameters, and then obtain the optimization direction of each parameter of the SIW filter. As an application example, this paper quickly designs the X-band fourth-order cross-coupling bandpass filter. The comparison between the measured results and the simulation results has good consistency, which proves the feasibility of the method proposed in this paper.

关 键 词：基片集成波导 电路优化 耦合矩阵 

分 类 号：TN713[电子电信—电路与系统]