USB总线微波功率计设计  

Design of microwave power meter via USB bus

作　　者：冯长磊[1] 年夫顺[2] 冷朋[2] 李金山[2] 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]中国电子科技集团公司第四十一研究所,山东青岛266555

出　　处：《电子技术应用》2011年第8期86-89,共4页Application of Electronic Technique

摘　　要：为提高微波功率测量仪器与其他设备的兼容性,简化电路结构,设计了二极管检波式USB总线微波功率计。重点研究了微弱信号检测、高速USB总线和数字校准技术。经过对二极管检波、微弱信号检测、USB通信的优化设计,制作了功率计探头。设计了数字校准补偿算法,利用NI-VISA和多线程技术设计编写了功率计软件。试验表明,设计的USB总线微波功率计可实现-55 dBm～+20 dBm范围内平均功率测量。In order to improve the compatibility of microwave power meter, new design which based on diode detector and USB bus is proposed. Weak signal detection, high-speed USB bus and the digital calibration technique is studied. After Optimized design of circuit, power sensor is made. Power meter software which contains digital calibration Compensation algorithm is designed. Experiments show that the USB bus microwave power meter can be achieved -55 dBm-＋20 dBm microwave power measurement.

关 键 词：功率计 微弱信号检测 USB总线 数字校准 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]