短語詞組短語narrow band sweep frequency 窄帶掃頻wide band video frequency 寬帶眡頻信號band center frequency 帶中心頻率average band sharing frequency 條帶共享率band crossing frequency 帶交叉頻率band limited frequency spectrum 限帶頻譜band of frequency 頻帶;頻段band pass frequency 通帶頻率broad band low frequency 低頻寬帶 返回 band frequency