作弊防控系统中独立可调双频带通滤波器设计  

Design of an Independently Adjustable Dual-band Bandpass Filter for Cheat Prevention and Control System

作　　者：石光明 马震远 麦智荣 林智勇 SHI Guang-ming;MA Zhen-yuan;MAI Zhi-rong;LIN Zhi-yong(Guangdong Testing Institute of Product Quality Supervision,Guangzhou,Guangdong 510670,China;Guangdong Polytechnic Normal University,Guangzhou,Guangdong 510665,China;Guangzhou Qichen Electronics Technology Co.,Ltd.,Guangzhou,Guangdong 510670,China;Guangzhou Education Infrastructure and Equipment Center,Guangzhou,Guangdong 510180,China)

机构地区：[1]广东产品质量监督检验研究院,广东广州510670 [2]广东技术师范大学,广东广州510665 [3]广州启辰电子科技有限公司,广东广州510670 [4]广州市教育基建和装备中心,广东广州510180

出　　处：《电子学报》2020年第8期1641-1646,共6页Acta Electronica Sinica

基　　金：广东普通高校重点项目(No.2019KZDXM063)。

摘　　要：文章提出了一种独立可调双频带通滤波器.该滤波器主要由一对加载变容二极管的并联耦合短路线、一对加载变容二极管的λ/2开路谐振器和公共输入输出部分组成.变容二极管和并联耦合短路线并联构成一个谐振器,产生第一通带.λ/2开路谐振器加载变容二极管,产生第二通带.通过改变加载在变容二极管上的偏置电压来改变变容二极管的电容值,使谐振器的谐振频率发生偏移,从而调节滤波器工作频率.结果表明,第一通带和第二通带的中心频率变化范围分别为0.2~0.4GHz和1.2~1.42GHz,调节百分比分别为66.5%和15.4%.仿真与测试的结果吻合良好,证明该设计方法是有效的.该滤波器可应用到作弊防控系统中.This paper presents an independently adjustable dual-band bandpass filter.The filter is mainly composed of a pair of varactor-loaded parallel coupling short circuits,a pair ofλ/2 varactor-loaded open resonators,and a common input/output component.The varactor diode and the parallel coupling short circuits are connected in parallel to form a resonator which produces the first passband.Theλ/2 varactor-loaded open resonators are used to load the varactors and produce the second passband.By adjusting the bias voltage on the varactors to change the capacitance value of the varactors,the resonant frequency of the resonators can be shifted and thus the operating frequency of the filter can be adjusted.Both the simulation and testing results show that,the center frequencies of the first and second passbands range from 0.2 to 0.4GHz and from 1.2 to 1.42GHz,respectively,and their adjustment percentages are 66.5%and 15.4%,respectively.The simulation results are well consistent with the testing results,proving that our filter design method is effective.The designed filter can be applied to the cheat prevention and control system.

关 键 词：独立可调 双频 带通滤波器 作弊防控系统 

分 类 号：TN73[电子电信—电路与系统]