宇航计测技术 ›› 2013, Vol. 33 ›› Issue (1): 4-9.doi: 10.12060/j.issn.1000-7202.2013.01.02

• 论文 • 上一篇    下一篇

一种新型双层介质结构Butler矩阵研究

丁轲佳1；贺斐2；吕善伟2；熊小军1   

  1. 1、北京航空航天大学 无人驾驶飞行器设计研究所，北京 100191；
    2、北京航空航天大学 电子信息工程学院，北京 100191
  • 出版日期:2013-02-15 发布日期:2013-02-15

Research on a Novel Bilayer Substrate Butler Matrix

DING Ke-jia1；HE Fei2；LV Shan-wei2；XIONG Xiao-jun1   

  1. 1、Research Institute of Unmanned Aerial Vehicle, Beihang University, Beijing 100191;
    2、School of Electronic Information Engineering, Beihang University, Beijing 100191
  • Online:2013-02-15 Published:2013-02-15

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摘要： 提出并实现一种基于双层微带结构的新型8×8 Butler矩阵。利用双层微波电路结构将器件分置于上下层以省略跨接器；采用两段近似λg/8阶梯耦合微带线Schiffman结构实现宽频带移相；采用三分支线定向耦合器作为宽带电桥。采用该方法设计并实现工作于C波段的8×8 Butler矩阵样品；实测结果表明，其可在(4.2~5.3)GHz范围内实现各端口回波损耗不大于10dB、端口隔离不小于17dB、功分比误差不超过±1.5dB、相位误差不大于±12°等指标，实测平均插入损耗约2.5dB。新型Butler矩阵较之采用跨接器的经典结构损耗小，更加适用于较大规模多波束成型网络。

关键词: Butler矩阵, 多层介质, Schiffman移相器, 宽带

Abstract: A kind of novel 8×8 Butler matrix based on multilayer substrate structure is presented and realized. A bilayer substrate structure is adopted to distribute components into the up and down layer to replace crossover. Two approximate λg/8 stepped coupling microstrip Schiffman phase shifter is used to realize wideband phase shift. A threebranch line coupler is employed as wideband bridge. An 8×8 Butler matrix sample working in C band frequency is designed and fabricated. The measured results indicate that in the frequency range over (4.2~5.3) GHz, the return loss of each port is better than -10dB, the isolation is better than 17dB, the distribution error is less than ±1dB, the phase error is less than ±12° and the measured average insert loss is about 2.5dB. Compared with conventional structure with crossover, the novel Butler matrix has lower loss and better adaptability to large scale multibeam forming network.

Key words: Butler matrix, Multi-layer substrate, Schiffman phase shifter, Wide-band

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