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中文摘要：
利用长为四分之一波长、两端交叉短路的对称耦合微带线和长为四分之三波长折叠微带线并联结构,提出一种新型小型化超宽带功率分配器。在等效传输线模型的基础上,采用奇偶模分解方法对其进行了理论分析,给出了参数设计方程。利用HFSS仿真优化一个微带结构的超宽带功率分配器。仿真和测量结果表明,通带内插入损耗小于2 dB,输入输出端口的回波损耗分别大于10 dB和7 dB,隔离度大于6 dB,高频带外插入损耗在13~20 GHz范围内大于20 dB。该结构尺寸仅为28 mm×32 mm,具有小型化的特点。
英文摘要：
A novel compact ultra-wideband （15WB） power divider is proposed. The structure is formed by a short-circuited coupled microstrip lines section connected in parallel to a folded microstrip line segment at each output port. Based on equivalent transmission line model, design equations and guidelines of the proposed UWB power divider are given using even-and-odd-mode analysis. Then a prototype of this power divider is designed and fabricated on microstrip topology. The simulated and measured results show the insertion loss is less than 2 dB. The return loss for the input/output ports is better than 10 dB/7 dB whereas the isolation is better than 6 dB. The out of band rejection level is more than 20 dB from 13 GHz to 20 GHz. It also has a small size of 28 minx32 ram.
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