The duplexer acts as a very broad band pass filter during receiving mode and the prearnp is a low noise wide band-width amplifer that is used to amplify the echo signals. 调谐电路对系统共振频率的漂移进行实时调谐,针对以上天线和模拟电路的功能,对天线和模拟电路进行了设计。
The signal processing system consists of a band pass filter(BPF) with center frequency of 2.856 GHz and bandwidth of 10 MHz,a logarithmic detector,a analog digital converting module,and a data acquisition program based on Labview. 带通滤波器选用中心频率为2.
By modeling the 2-finger FET into CPW, the on-state millimeter-wave traveling wave switches are equivalent to the step impedance band pass filter and the design procedure is obtained. 因为二指场效电晶体可以等效于共面波导，所以行波切换器的设计就等效于步阶阻抗低通滤波器。有关细部设计流程也包含于本论文中。
First,a finite impulse respond(FIR) band pass filter is designed based on Chebyshev approximation method,and then the windowed impulse response is used to adjust energy distribution of signal. 本文针对极窄脉冲超宽带自导信号,提出了一种基于滤波器的设计方法,首先按照切比雪夫近似方法设计有限脉冲响应(FIR)带通滤波器,然后将滤波器冲激响应做加窗处理来调节信号能量分布。
It is used main for ferroelectric , piezoelectricity,electro-optic and nonlinear optical.It is made up the broad frequency band,modulator,high stabeness resonator and band pass filter etc. 主要用于铁电、压电、电光和非线性光学，可制作宽频带、调制器、高稳定性谐振器和带通滤玻器等。
Design of RC Four-stage Active Band Pass Filters 四阶RC有源带通滤波器的设计