一种小型化多协议超高频RFID读写器模块
A Miniaturized Multi-protocol UHF RFID Reader Module
  
DOI:
中文关键词:  射频识别,读写器,高隔离度,低噪声,小型化
英文关键词:RF identification,reader,high isolation,low noise,miniaturization
基金项目:四川省科技计划(2016GZ0116、2016GZ0061);广东省省级科技计划(2015B090909004)
作者单位
陈 俊,张博阳, 黄 钟, 李 建, 文光俊 电子科技大学通信与信息工程学院射频集成电路与系统中心, 成都 611731 
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中文摘要:
      设计了一种兼容国际标准ISO/IEC 18000-6C 和中国标准GB/T 29768-2013 的超高频射频识别读写器模块。基于定向耦合器的双调谐射频收发电路以紧凑的结构实现了较高的隔离度,降低了对接收前端电路的线性度要求。利用定向耦合器的耦合信号作为解调本振,以提高其与射频自干扰的相关性,降低下变频后的基带残留相位噪声。设计的读写器模块工作在920~925 MHz 频段,饱和输出功率为29.6 dBm,对6C和国标标签的盘存距离均超过15 m。读写器模块的小型化通过采用小尺寸的收发隔离电路和电路板的三维堆叠封装得以实现,其体积仅为70 mm*60 mm*15 mm。
英文摘要:
      An ultra-high frequency RF identification reader module is designed in this paper, which supports the international standard ISO/ IEC 18000-6C and the Chinese standard GB/ T 29768-2013. High isolation is achieved by a directional coupler based double-tuning RF transmit-receive circuit with a compact structure, which alleviates the linearity requirements of the receiver front-end. By utilizing the coupled signal from the directional coupler as the local-oscillation signal of the demodulator, the correlation between the local-oscillation signal and the RF self-jammer is improved, and the residual phase noise of the down-converted baseband signal is reduced. The designed reader module operates in 920-925 MHz band with a saturate output power of 29.6 dBm, and the inventory range is larger than 15 m for both the 6C tag and the Chinese standard tag. The miniaturization of the reader module is realized by using the compact transmit-receive isolation circuit and 3D stacked package printed circuit boards, and the volume is only 70 mm*60 mm*15 mm.
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