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汉语拼音：pín duàn

1.把无线电波按频率不同而分成的段，例如低频﹑中频﹑高频﹑超高频。

1. 把无线电波按频率不同而分成的段，例如低频、中频、高频、超高频。

• Unlike analogue transmissions, digital signals do not "bleed" into one another and can therefore be packed closer together.

  不像模拟传播方式，数字信号不会互相交错，因此能够在更相邻的频段内打包发射。

• Similarly, India is about to auction off FM radio spectrum and the competition is expected to be fiercest for the big cities, says N.

  萨布拉马尼说，与此类似，印度即将拍卖FM无线电频段，而据预计针对大城市的竞拍将会是最激烈的。

• It was in the microwave range, and it appeared to be coming from all directions simultaneously.

  这一噪音处于微波频段，它同时出现在各个方向。

• Whitt said he expected devices using white-space spectrum could be available by the end of 2009.

  威特先生说，他期待使用空白频段的设备到2009年底就会出现。

• The FCC is testing equipment to see if the white-space spectrum can be used without interfering with television broadcasts.

  联邦通信委员会正在测试设备，看看空白无线电频段能不能在不干扰电视广播下使用。

• In the general sense, frequency ranges can be emphasized or attenuated using low-pass, high-pass, band-pass or band-stop filters.

  在通常的概念中，频段可以被增强或削弱通过使用低通，高通，带通和带阻滤波器。

• Designed method of a modified repetitive controller is proposed and its application to high-frequency angular-vibration table is introduced.

  针对高频角振动转台在高频段跟踪周期信号的精度低问题，提出一种改进重复控制器设计方法。

• Lightning detection is of great significance in the national life, in which the VHF-band detection plays an important role.

  闪电探测在国民生活中有着重要的意义，VHF频段的信息对于雷电探测和预警有着尤为重要的意义。

• "We are trying to make sure we're using this spectrum in the most efficient way possible, " Martin says.

  马丁说：“我们努力确保用最为有效的方式使用这个频段。”