阻带频率（the stopband frequency ）：也是用来说明电路频率特性指标的特殊频率。当保持电路输入信号的幅度不变，改变频率使输出信号衰减60dB时，该频率称为阻带频...
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电路阻抗（Impedance）：Z0（ohm） 截止频率(Cutoff Frequency)：fc(Hz) 截通频率(Stopband Frequency)：fc(Hz) 通带衰减量 阻带衰减量 步骤二：计算元件级数(Order of elements,N).
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It is shown experimentally that a method available for compensating for the diffraction by centre frequency in narrow band filters can effectively improve their stopband characteristics.
本文介绍适用于窄带滤波器的中心频率衍射补偿方法。实验表明，此方法可以有效地改善滤波器的阻带特性。
The theoretical results show that for TM waves there exist frequency passband (s) and stopband (s) which can be switched into each other by varying the power.
理论分析表明，非线性TM表面波存在频率通带和禁带，通过调节导波功率可以实现通带和禁带之间的转换。
The design method of an active SAW filter module with low frequency and high stopband rejection is introduced in this paper.
介绍了一种低频高阻带抑制SAW有源滤波组件的设计方法，并介绍了最新研制的滤波组件的性能。
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