摘要
文章分析了低通滤波器的设计原理。基于砷化镓(GaAs)工艺,利用ADS软件仿真设计了一款低通滤波器芯片。其实物测试结果在通带DC^1.5GHz内,插入损耗≤1.4dB,回波损耗≥15dB,其在2.6 GHz处的带外抑制达到了20dB,在2.85 GHz处的带外抑制达到了40dB,整个阻带一直到20GHz都有大于40dB的抑制,且芯片尺寸仅为1.5mm×0.65mm×0.1mm。该低通滤波器的实测结果与仿真结果对比吻合,电特性优良,具有较高的实用价值。
In this paper,the design principle of low-pass filters is analyzed firstly and a low-pass filter is designed through ADS simulation based on the GaAs technology.In addition,the proposed filter is fabricated and tested.The test results show an insertion loss of not more than 1.4 dB and a return loss of not less than 15 dB in the pass-band of DC^1.5 GHz,an out-of-band rejection of 20 dB at 2.6 GHz,and an out-of-band rejection of 40 dB at 2.85 GHz.The stopband rejection of the filter remains over 40 dB from 2.85 GHz to 20 GHz.The chip size is 1.5 mm×0.65 mm×0.1 mm.The test results are in good agreement with the simulation results.The proposed low-pass filter has good electrical characteristics and therefore high practical utility.
作者
张斌
ZHANG Bin(Xi'an Electronic Engineering Research Institute, Xi'an 710100)
出处
《火控雷达技术》
2020年第1期66-69,83,共5页
Fire Control Radar Technology
