Far away from the  antennas, the waves join to form a wave front that is a planar wave.

远离天线的地，波会汇聚在一起形成一个平面波的波前。

They can even send waves from all directions, so they form circular wave fronts and then all the wave energy is channeled into one spot they call the bullseye.

它们甚至可以从各个向发送波浪，因此它们形成圆形波阵面， 然后所有波浪能量都被引导到一个被它们称为“靶心” 的点。

Just as before, by continuously changing the timing of when  each wave peak is emitted by each antenna, we can change the angle at which the wave front  is formed, essentially steering the beam in one direction or another.

与以前一样， 通过不断改变每个天线发射每个波峰的时间，我们可以改变波前形成的角度，本质上将光束引导到一个向或另一个向。