数控衰减器的设计

数控衰减器的设计 Design of Numerically Controlled Attenuator 蒋铁珍 JIANG Tie-zhen 1 2 first-author 石振华 SHI Zhen-hua 1 2 吴世才 WU Shi-cai 1 2 王淑融 WANG Shu-rong 1 2 武汉大学电子信息学院 武汉大学电子信息学院 School of Electronic Information,Wuhan University School of Electronic Information,Wuhan University 武汉大学电子信息学院,湖北,武汉,430072 武汉大学电子信息学院,湖北,武汉,430072 根据高频电路阻抗匹配的原则 ,利用微型真空继电器和贴片电阻网络以及单片机控制技术 ,设计和制作了一种数码控制的衰减器 ,它通过一个 4× 4的数字键盘对衰减量的大小进行设置 ,并可提供衰减量的数字显示 ,具有体积小、工作频率高、可靠性好、功能强、操作方便、适用面广等优点 Single chip computer is a widely used device in recent years.It has quite powerful control capability.This paper presents an introduction on how to make a numerically controlled attenuator according to the principle of HF circuit impedance match,the control skill of single chip computer and the use of micro relay.This numerical control attenuator designs the size of the attenuation by a 4×4 digital keyboard and provides the digital display of the attenuator.It also possesses many advantages,such as small volume,high work frequency,strong function,convenient operation,and wide applicability use.Its main technical specifications are as follows:frequence scale 0 1 GHz,attenuation scale 0 1 20 dB,characteristical impendance 50 Ω,encamped wave coefficient 1.2 1 .4, attencation error ≤1%,maximum inport voltaqe 5 V. 单片机 数控衰减器 双层屏蔽 Π型网络 微型继电器 single chip processor numerical control attenuator double layered shield Π network microrelay TN98 国家 8 63计划资助项目 （863 -818-0 1-0 2 ） 2001-05-01 2021-04-01 5