提出了一种同轴转弯波导。介绍了该同轴转弯波导的基本原理, 设计并数值模拟了中心频率为4.0 GHz的同轴转弯波导, 并对此同轴转弯波导进行了实验研究。实验结果表明：同轴转弯波导在中心频率4.0 GHz 下, 传输损耗约为0.17 dB, 驻波系数为1.2；在3.8～4.2 GHz的频率范围内传输损耗小于0.2 dB, 驻波系数小于1.25。同轴转弯波导内部无介质支撑, 且体积小, 结构简单, 易于实现, 适用于高功率微波馈线系统中的同轴波导的转弯和连接。

A type of bend coaxial waveguide has been proposed. Its application background and principle were introduced, and the design and numerical simulation of a bend coaxial waveguide at the center frequency 4.0 GHz were conducted, as well as the experiment research. The experiment result indicates that, at the center frequency of 4.0 GHz, the loss is about 0.17 dB and the voltage standing wave ratio(VSWR) is about 1.20. In the range of 3.8 GHz to 4.2 GHz, the loss and the VSWR are below 0.20 dB and 1.25 respectively. The bend coaxial waveguide has the advantages of small volume, simple structure, no dielectric support and easy to machining, which can be applied to coaxial waveguide connection and bend in the feed network of high power microwave.