摘要
为了实现电子标签检测系统扫频信号源的设计,采用了直接数字频率合成技术(DDS),并根据检测系统的需求,选取了DDS芯片AD9830作为频率合成器件,辅助以高频功率放大电路,实现了主体硬件电路设计;通过软件的方式获得了以检测标签谐振频率为中心的2 MHz带宽、扫频时间可控的扫频信号源。研究结果表明,DDS频率合成技术,能较好地实现精度高、转换时间快的电子标签检测扫频信号源。
Aiming at realizing swept signal source of radio frequency identification （FRID） detection systems, the DDS direct digital synthesis technology was used, and in accordance with FRID detection systems, DDS chip AD9830 was selected as the frequency synthesizer device, The main hardware circuit was developed and supported by high-frequency power amplifier circuit. And then the needed swept signal source was implemented by software, which the center of 2 MHz bandwidth is the resonant frequency of the tag and the sweep time would be controlled. The results indicate that DDS synthesis technology can realize signal source of high accuracy and fast switching time.
出处
《机电工程》
CAS
2010年第3期100-102,106,共4页
Journal of Mechanical & Electrical Engineering
