UHF标签芯片模拟前端及低功耗关键技术研究
发布时间：2018-08-21 08:47
【摘要】：RFID无源超高频(UHF)射频识别系统是一种由标签和阅读器组成,利用超高频电磁波信号进行信息交换并以此实现身份识别的技术。由于RFID UHF系统具有距离远、携带方便、成本低、读取速度快和可多次擦写等优点,目前在物流管理、智能城市等各种领域都被广泛使用。本论文主要设计了无源超高频电子标签芯片的模拟射频前端电路,并针对标签低功耗进行了电路上的改进。UHF电子标签是通过天线接收和反射信号来完成标签和阅读器之间的通信,标签工作的能量全部来自与阅读器发射的信号,距离越远则接收到的能量就越小,因此要实现标签的远距离工作,降低标签的功耗和提高能量利用率是至关重要的。本论文从改进标签芯片的时钟电路和整流电路两个方面降低标签的功耗和提高能量利用率,以此实现标签的远距离识别。首先论文基于ISO/IEC18000 Type C协议介绍了RFID UHF系统的通信方式,包括前向链路和反向链路的能量传播方式、标签与阅读器通信的信息调制方式和编码方式,它们为模拟射频模块的设计提供了基本的理论基础和参考。其次,我们对模拟射频前端电路的每个子电路进行了设计和研究,同时分析了其优缺点。为了实现标签芯片的低功耗和较高的能量利用率,我们对时钟电路和整流电路进行了改进,时钟电路采用张弛振荡电路,整流电路采用动态阈值消除技术,最终采用Cadence Spectre工具基于SMIC 0.18umRF工艺对电路进行仿真优化,仿真结果证实改进后的电路可以大幅降低芯片的功耗,同时提高能量的利用率。最后,我们采用SMIC 0.18μm CMOS工艺实现了模拟射频前端电路的版图。
[Abstract]:RFID passive UHF (UHF) RFID system is a kind of technology which is composed of tags and readers and uses UHF electromagnetic wave signal to exchange information and realize identification. RFID UHF system is widely used in logistics management, intelligent city and other fields because of its advantages such as long distance, convenient carrying, low cost, fast reading speed and multiple erasure. In this paper, the analog RF front-end circuit of passive UHF tag chip is designed. The low power consumption of the tag is improved in circuit. The UHF electronic tag is to complete the communication between the tag and the reader by receiving and reflecting signals from the antenna, and the energy of the tag work comes from the signal transmitted with the reader. The longer the distance, the smaller the energy received, so it is very important to reduce the power consumption and improve the energy efficiency to realize the remote work of the tag. In this paper, we improve the clock circuit and rectifier circuit of the tag chip to reduce the power consumption and improve the energy utilization ratio, so as to realize the remote identification of the label. First of all, based on ISO/IEC18000 Type C protocol, the paper introduces the communication mode of RFID UHF system, including the energy transmission mode of forward link and reverse link, the information modulation mode and coding mode of tag and reader communication. They provide the basic theoretical basis and reference for the design of analog RF module. Secondly, we design and research each sub-circuit of analog RF front-end circuit, and analyze its advantages and disadvantages. In order to realize the low power consumption and high energy utilization of the tag chip, we improve the clock circuit and rectifier circuit. The clock circuit adopts Zhang Chi oscillation circuit, and the rectifier circuit adopts dynamic threshold elimination technology. Finally, the Cadence Spectre tool is used to optimize the circuit based on SMIC 0.18umRF technology. The simulation results show that the improved circuit can greatly reduce the power consumption of the chip and improve the utilization of energy. Finally, we use SMIC 0.18 渭 m CMOS process to realize the layout of analog RF front-end circuit.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN402
本文编号：2195188
[Abstract]:RFID passive UHF (UHF) RFID system is a kind of technology which is composed of tags and readers and uses UHF electromagnetic wave signal to exchange information and realize identification. RFID UHF system is widely used in logistics management, intelligent city and other fields because of its advantages such as long distance, convenient carrying, low cost, fast reading speed and multiple erasure. In this paper, the analog RF front-end circuit of passive UHF tag chip is designed. The low power consumption of the tag is improved in circuit. The UHF electronic tag is to complete the communication between the tag and the reader by receiving and reflecting signals from the antenna, and the energy of the tag work comes from the signal transmitted with the reader. The longer the distance, the smaller the energy received, so it is very important to reduce the power consumption and improve the energy efficiency to realize the remote work of the tag. In this paper, we improve the clock circuit and rectifier circuit of the tag chip to reduce the power consumption and improve the energy utilization ratio, so as to realize the remote identification of the label. First of all, based on ISO/IEC18000 Type C protocol, the paper introduces the communication mode of RFID UHF system, including the energy transmission mode of forward link and reverse link, the information modulation mode and coding mode of tag and reader communication. They provide the basic theoretical basis and reference for the design of analog RF module. Secondly, we design and research each sub-circuit of analog RF front-end circuit, and analyze its advantages and disadvantages. In order to realize the low power consumption and high energy utilization of the tag chip, we improve the clock circuit and rectifier circuit. The clock circuit adopts Zhang Chi oscillation circuit, and the rectifier circuit adopts dynamic threshold elimination technology. Finally, the Cadence Spectre tool is used to optimize the circuit based on SMIC 0.18umRF technology. The simulation results show that the improved circuit can greatly reduce the power consumption of the chip and improve the utilization of energy. Finally, we use SMIC 0.18 渭 m CMOS process to realize the layout of analog RF front-end circuit.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN402
【参考文献】
相关硕士学位论文 前1条
1 雷旭;UHF射频识别系统中的天线分析与设计[D];西安电子科技大学;2013年
，本文编号：2195188
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