视轴线 meaning in Chinese

visual axis

If the reference element has a phase of zero , compute the phase applied to element five when the beam is scanned 40o above the boresight axis
如果参考单元的相位是零，计算第五单元当扫描视轴线以上40度的相位。
Similarly , to position the beam below the boresight axis requires the use of a negative angle . this yields a negative and equation ( 7 - 4 ) again yields the applied phase of each element
同样的，要使波束低于视轴线要求负的角度。增量就是负的，式（ 7 - 4 ）仍可用于计算每个单元的增量。
The previous discussion addressed the theory required to compute the relative phase shift between adjacent radiating elements in order to position the beam of an array - type antenna to a specific angle off of the antenna boresight axis
前面的讨论中给出了计算使阵列天线的波束相对天线视轴线偏移一个给定角度所需的相邻单元间相对相移的理论。