空气带状线交叉耦合腔体3dB电桥设计

Design of stripline-structured cross-coupling air cavity 3 dB hybrid

针对传统电桥功率容量小、互调差等缺点,文章提出了一种新型宽带3dB电桥设计方案。该方案采用一种新型交叉耦合腔体结构,可使两输入端与两输出端分别在同一侧面。实验测量结果与仿真结果基本吻合,结果表明该新型结构电桥带宽可达到800～2 500MHz,功率容量比传统方法增加1倍,具有体积小、互调低、插损低、方向性高、易生产和易调试等优点。

In view of the problem that the traditional hybrid has small power capacity and poor intermodula- tion, a design scheme of a new broadband 3 dB hybrid is presented in this paper. A new type of cross-cou- pling cavity structure is used in the scheme, and two inputs and two outputs are designed respectively on the same side. The experimental results are found to be in good agreement with the simulated results. It is shown that the new structure can operate from 800 MHz to 2 500 MHz and support a power capacity doubled than that of traditional methods. It has the advantages of smaller volume, lower intermodulation, lower insertion loss, higher directivity, easier production and easier debugging etc.