This paper derives the formulations of VSWR and phase-shift loss of a rotary due to the chokes based on the theory of chohe.The example calculations for different cases are given.

• 根据转动交连扼流槽原理，推导出了扼流槽引起的电压驻波比与相移的计算公式，并且计算出不同条件下扼流槽的驻波与损耗。