2.4 GHz高阶微带滤波器的设计与仿真  

Design and Simulation of 2.4 GHz High-Order Micro-Strip Filter

作　　者：罗兵[1] 刘建圻[2] LUO Bing;LIU Jianqi(School of Electronics and Communications,Guangdong Mechanical and Electrical Polytechnic,Guangzhou 510515,China;School of Automation,Guangdong University of Technology,Guangzhou 510520,China)

机构地区：[1]广东机电职业技术学院电子与通信学院,广州510515 [2]广东工业大学自动化学院,广州510520

出　　处：《电子器件》2020年第5期963-967,共5页Chinese Journal of Electron Devices

基　　金：广东省自然科学基金项目(2018A0303130326,2019A1515011056);国家自然科学基金项目(61701122);广东省省级科技计划项目(2017A010101017)。

摘　　要：介绍了滤波器的理论基础,并在理论计算与分析的基础上,使用射频/微波仿真软件ADS/SONNET设计了一种2.4 GHz(WLAN系统1信道)微带带通滤波器,为了达到带外极高的抑制能力,滤波器共有14阶,采用梳状型结构,能有效抑制带外干扰,提高WLAN系统的抗干扰能力,设计结果表明在通频带(2.401 GHz^2.423 GHz)内,2.33 dB≤S21≤3.45 dB,SWR≤1.41,而带边陡峭度高达17 dB/MHz,带外抑制达到50 dB以上。比较了电路仿真、电磁仿真和实际测试结果的区别,最终结果表明,电磁仿真与实际测试结果吻合,将高阶滤波器用于电磁环境复杂的场景,能显著改善WIFI通信系统的通信距离和通信质量。The basic theory of filter is introduced,and a 2.4 GHz(the first channel of WLAN system)micro-strip band-pass filter is designed on the basis of theoretical calculation and analysis by using ADS/SONNET software.In order to achieve extremely high suppression ability outside the band,the filter has 14 stages and uses comb structure,which can effectively suppress out-of-band interference and improve the anti-interference ability of WLAN system.The design results show that in pass-band(2.401 GHz^2.423 GHz),2.33 dB≤S21≤3.45 dB,SWR≤1.4,and the steepness of the band-edge is 17 dB/MHz.High out-of-band rejection about 50 dB has been achieved.The differences between circuit simulation,electromagnetic simulation and actual test results are compared.The final results show that the electromagnetic simulation results are consistent with the actual test results.The high-order filters applied in complex electromagnetic environment can significantly improve the communication distance and quality of communication systems.

关 键 词：高阶滤波器 ADS仿真 SONNET仿真与优化 驻波比 插入损耗 高抑制 

分 类 号：TN713[电子电信—电路与系统]