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因此，人们将注意力逐渐转移到了波束切换智能天线的实现上来。
Thus, people pay their attention to the realization of the switched-beam smart antenna gradually.
相控阵雷达的波束可以瞬时切换，为数据率的自适应更新提供了方便。
The beam of phased array radar can be switched instantaneously, which gives facilities for the adaptive update of data rate.
为了实现波束的切换，并且在降低成本的前提下使用了开关与传输线组合的移相单元。
In order to achieve beam switching, and under the premise of reducing the cost of using the combination of switching and transmission-line phase-shift unit.
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