所设计滤波器的选择性和阻带衰减可预先给定并易于控制。
The filter selectivity and stopband attenuation can be easily specified or controlled.
新的方向滤波器组具有良好的方向和频率选择性。
The new DFB can provide good directional and frequency selectivity.
带有一对传输零点的准椭圆函数滤波器相比切比雪夫型滤波器具备更好的选择性。
The quasi-elliptic function filter with one transmission zero has the better selectivity than the general Chebyshev filter.
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