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

SHI Guang-ming; MA Zhen-yuan; MAI Zhi-rong; LIN Zhi-yong

doi:10.3969/j.issn.0372-2112.2020.08.025

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

更新时间：2025-07-16

- Design of an Independently Adjustable Dual-band Bandpass Filter for Cheat Prevention and Control System
- Acta Electronica Sinica Vol. 48, Issue 8, Pages: 1641-1646(2020)
- 作者机构：
  
  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
  5. 广东产品质量监督检验研究院,广东,广州,510670
  6. 广东技术师范大学,广东,广州,510665
  7. 广州启辰电子科技有限公司,广东,广州,510670
  8. 广州市教育基建和装备中心,广东,广州,510180
- 作者简介：
- 基金信息：
  
  Key Program of Universities of Guangdong Province (No.2019KZDXM063)
- DOI：10.3969/j.issn.0372-2112.2020.08.025
  CLC： TN73
- Published Online：25 August 2020，
  
  Published：2020
- 稿件说明：
移动端阅览
SHI Guang-ming, MA Zhen-yuan, MAI Zhi-rong, et al. Design of an Independently Adjustable Dual-band Bandpass Filter for Cheat Prevention and Control System[J]. Acta Electronica Sinica, 2020, 48(8): 1641-1646.
DOI：

SHI Guang-ming, MA Zhen-yuan, MAI Zhi-rong, et al. Design of an Independently Adjustable Dual-band Bandpass Filter for Cheat Prevention and Control System[J]. Acta Electronica Sinica, 2020, 48(8): 1641-1646. DOI： 10.3969/j.issn.0372-2112.2020.08.025.

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

/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.

/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.

Abstract

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 of

/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. The

/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 t

he 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.

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