A directional coupler based on a microstrip branch line for 5G millimeter wave communication is designed. The branch line structure is simple and easy to implement. The comprehensive decomposition design method of the microwave system is proposed to improve the design efficiency. Based on the theoretical analysis of microwaves, the design method of combining automatic tuning and manual tuning optimization is used to optimize the schematic simulation. The layout simulation adopts iterative optimization to approximate the design index and reduce the influence of branch line connection loss. Finally, a millimeter wave branch line directional coupler is designed with a bandwidth of 24.25ghz to 27.5ghz, a coupling degree and insertion loss of about 5dB, and an isolation degree of more than 20dB. In the coming 6G, this design method has a certain forward-looking significance.

中文翻译：

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面向5G毫米波通信的支线定向耦合器设计

设计了一种面向5G毫米波通信的基于微带支线的定向耦合器。支线结构简单，易于实现。为提高设计效率，提出了微波系统的综合分解设计方法。在微波理论分析的基础上，采用自动调谐与手动调谐优化相结合的设计方法，对原理图进行仿真优化。布局仿真采用迭代优化逼近设计指标，降低支线连接损耗的影响。最后设计了一款毫米波支线定向耦合器，其带宽为24.25GHz～27.5GHz，耦合度和插入损耗约为5dB，隔离度大于20dB。在即将到来的6G中，