当环数增加时，过渡带衰减速度变快，通带形状更接近方形。

And a square passband shape was achieved for the larger ring number and the faster transition attenuation.

youdao

当环数增加时，过渡带衰减速度变快，通带形状更接近方形。

And a square passband shape was achieved for the larger ring number and the faster transition attenuation.

youdao