如何实现极窄的通带宽度和极小的中心频率偏差是研制中所解决的关键技术问题。
The key technique of this new filter is how to achieve the extreme narrow band-pass width and a slight deviation of central frequency.
我们用频带宽度这个词来代表这样的频率范围。
We use the term bandwidth to represent such a frequency range.
该仪器频带宽度宽，频率和占空比可调，拓宽了仪器的应用领域。
It is characterized by broadband, adjustable frequency, and adjustable duty ratio, so the instrument has wide application field.
结果表明，改进后仪器接收到的地震反射波主振幅、主频率、频带宽度、垂向分辨率及仪器记录信号的有效动态范围均有不同程度的提高。
The results show that the main amplitude, main frequency and frequency band of reflected wavelet and the effective dynamic range of system have different degrees of increase.
通常希望一个天线的波瓣图和阻抗能在一个较宽的频率范围内(例如频带宽度为10或更高)保持不变。
It is promised that the lobe pattern and impedance of a antenna are kept common in a wider frequency field (as bandwidth is 10 or more).
通常希望一个天线的波瓣图和阻抗能在一个较宽的频率范围内(例如频带宽度为10或更高)保持不变。
It is promised that the lobe pattern and impedance of a antenna are kept common in a wider frequency field (as bandwidth is 10 or more).
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