相位常数是描述传输线上传播的电磁波在传播中相位变化的物理量
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从而推得多叶应力区扭转光纤中的超本地模，由超本地模的相位常数来确定该光纤的双折射。
Then, super-local modes in multi-lobe stress region spun fibers can be obtained by using mode transform. Finally, the fiber birefringence is decided from the phase constants of super-local modes.
为了解决这一矛盾，在尘埃等离子体理论基础上，导出了弱电离尘埃等离子体的微波衰减常数和相位常数计算公式。
In order to solve the problem, the calculation formula of microwave attenuation constant and phase constant of weakly ionized dusty plasma was deduce.
通过在微带漏波天线的辐射边缘周期性地加载微带电感，可减小微带漏波天线的相位常数，进而减小微带漏波天线的主波束方向角。
The phase constant of MLWA decreases with microstrip inductors loading along the leaky line, which results in the decrease of the main beam direction angle of MLWA.
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