对微波相位敏感的电子系统, 要求信号在电缆中传输时由环境温度变化和线缆机械应力作用引起的相位变化较小, 以确保传输信号较低的信号畸变。在-20~60 ℃温度范围内和 50~ 200 mm静态机械弯曲影响下对不同结构的同轴电缆传输相位变化特性进行了理论分析并开展实验验证, 得到了 2种常用同轴电缆传输相位随温度和机械弯曲变化的灵敏度。温度在 0~10 ℃时, 电缆传输相移突然增大; 静态机械弯曲时, 弯曲半径由 50 mm增大至 200 mm时, 电缆传输相移可减小一半。在同轴电缆的选择和使用环境的确定时需考虑这些因素的影响。

In the phase-sensitive electronic system, it requires steady phase against environment temperature and mechanical deformation to ensure the low distortion of signal. Phase characteristics of coaxial cable with different structures are theoretically analyzed and experimentally verified in the temperature range of -20-60 ℃ and static mechanical bending radius range of 50-200 mm, and the phase sensitivity change with temperature and mechanical bending of two common coaxial cables is obtained. When the temperature is in 0-10 ℃, the phase shift of the cable will suddenly increase. When the bending radius increases from 50 to 200 mm under static mechanical bending, the phase shift of the cable will be reduced by half. The influence of these factors should be taken into account when selecting coaxial cable and determining the application environment.