一种EAS扫频信号源的设计与实现  

Design and Implementation of an EAS Swept Signal Source

作　　者：牛元海 刘太君[1] 叶焱[1] 石志京 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《无线电通信技术》2014年第6期93-96,共4页Radio Communications Technology

基　　金：国家自然科学基金项目(61171040);浙江省自然科学基金项目(Y1101270)

摘　　要：电子商品防盗系统的不断优化与升级对扫频信号源的性能和特色提出了更高的要求。在硬件模块升级的同时,提出了一种频率可锁定的扫频信号源的的设计方案并成功实现。首先分析了正弦波的合成原理,并对系统使用芯片进行简要介绍;然后对系统的硬件设计方案展开论述,包括电源、时钟、JTAG调试端口以及接口设计,并给出了电路图;最后,详细介绍系统软件设计,并给出了程序流程图与详细代码。测试结果表明:设计输出的正弦波频率精确度高,幅度稳定,相位噪声较小,尤其是其所具有的锁频功能,更有利于标签的正确检测和识别。Some higher requirements on performance and features are put forward for swept signal source with the constant optimization and upgrading of Electronic Article Surveillance（EAS） system.With the upgrading of the hardware module at the same time,this paper proposes and successfully implements a scheme of swept signal source in which the frequency can be locked.Firstly an analysis of the synthesis principle of sine wave and a brief introduction of chips in use are given.Then the hardware design scheme of system is discussed including power supply,clock,JTAG port and interface design,and the circuit diagrams are given.Finally it introduces in detail the design of system software with program flow chart and detailed codes presented.The test results show that sine wave of this design possesses higher frequency precision,more stable amplitude and smaller phase noise,and the correct detection and identification of tags benefit from the lockable frequency particularly.

关 键 词：扫频信号源 频率锁定 相位噪声 标签检测 

分 类 号：TP741[自动化与计算机技术—检测技术与自动化装置]