... 主板驱动光驱 main board drive compact disk 主瓣方向 main lobe direction 主参考时钟 Primary Reference Clock PRC ...
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The direction of acoustic beam and angular width of main lobe can be changed by properly amplitude-weighting, decreasing the frequency of impulsive signal and adjusting the interval of array elements.
通过适当的幅度加权、降低激励信号的频率、调整阵元的间距等措施可以改变辐射声束的方向和辐射主瓣的角宽。
Main lobe: This is the radiation lobe containing the direction of maximum radiation.
主瓣：它是一个辐射波瓣，其中含有最大辐射的方向。
At the same time under the direction of Figure lobe half-power beam width of the main requirements to determine their unit number and unit spacing.
同时根据方向图主瓣半功率波束宽度要求确定其单元数和单元间距。
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