It is difficult to calibrate an X-probe, since the directional coefficient is coupled into the calibration curve.
对于X型探头，热线的方向系数耦合在校准曲线里，这给热线校准带来一定的困难。
2
This paper explained the work theory and the process of design about the parallel coupled line directional coupler.
阐述了平行耦合线定向耦合器的工作原理和设计过程。
3
It affords a smoother ride at high motorway speeds in the form of a more indirect ratio, coupled with directional stability that is resistant to slight movements.