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介绍了数字家庭网关硬件设计架构,对其中的射频滤波器设计进行了详细阐述,给出了集总参数和分布参数两种设计思路下从理论计算、ADS辅助设计到仿真、优化的完整滤波器设计步骤。结合目前常用的中心频率为2.4GHz的射频带通滤波器的设计实例,采用Chebyshev滤波器设计的低通原型进行变换,借助ADS分别设计了LC滤波电路和平行耦合微带线滤波电路,给出了原理图仿真和优化结果,对平行耦合微带线滤波电路,更进一步给出了电路版图和Momentum仿真结果。仿真结果表明:这两种设计方案满足设计的要求,是可行的,在高频段工作时应首要考虑微带线滤波的方法进行设计。
Introduced the digital home gateway hardware design architecture, the RF filter design in which a detailed exposition, given the lumped parameters and distribution parameters from two design ideas from theoretical calculations, ADS aided design to simulation, optimization, complete filter Design steps. Combined with the commonly used RF band-pass filter with center frequency of 2.4GHz, this paper uses the low-pass prototype of Chebyshev filter to transform. By using ADS, LC filter circuit and parallel coupled microstrip line filter circuit are given respectively The schematic simulation and optimization results show the circuit layout and Momentum simulation results for the parallel coupled microstrip line filter circuit. The simulation results show that it is feasible to meet the design requirements of both design schemes. The design of microstrip line filter should be the first consideration when working in high frequency band.