摘要
该文介绍了一种宽带滤波器的优化设计方法 ,即结合采用影像参数法的定K式和m导出式 ,分别设计相应的低通、高通滤波器 ,将其级联后得到初步的宽带带通滤波器 ;然后利用MATLAB进行仿真调试 ,对比设计要求和滤波器响应特性 ,反复调整滤波器LC参数 ,以获得最好的滤波性能。这种方法设计的带通滤波器带宽大、噪声低、频率响应特性较理想 ,并且设计简单、计算容易 ,也易于实现。这种设计方法特别适用于本身计算、比较复杂的宽带滤波器的设计。
The paper presents a kind of optimized design of broadband filter. In this design, we adopt the Image Parameters Method, combining the type K with the m educed, which are two types of the Method, and design the corresponding LPF and HPF respectively, then unite them in series to obtain a primary broadband BPF. Then we repeat modifying its LC parameters through MATLAB simulation, compared with the design demand and the filter's responding characteristic to obtain the best filtering capability. The filter designed has broad band, low noise, perfect characteristic responding to the frequency. It is simple to design, easy to compute, and easy to realize, too. This method is especially applicable to the design of broadband filter which has its own complicated computation and design. The broadband LC filter designed in this paper has applied in an actual project perfectly.
出处
《计算机仿真》
CSCD
2005年第2期110-112,235,共4页
Computer Simulation
关键词
滤波器
宽带
影像参数法
仿真
Filter
Broadband
Image parameters method
Simulation
