【摘要】：RFID無源超高頻(UHF)射頻識別系統(tǒng)是一種由標簽和閱讀器組成,利用超高頻電磁波信號進行信息交換并以此實現(xiàn)身份識別的技術(shù)。由于RFID UHF系統(tǒng)具有距離遠、攜帶方便、成本低、讀取速度快和可多次擦寫等優(yōu)點,目前在物流管理、智能城市等各種領(lǐng)域都被廣泛使用。本論文主要設計了無源超高頻電子標簽芯片的模擬射頻前端電路,并針對標簽低功耗進行了電路上的改進。UHF電子標簽是通過天線接收和反射信號來完成標簽和閱讀器之間的通信,標簽工作的能量全部來自與閱讀器發(fā)射的信號,距離越遠則接收到的能量就越小,因此要實現(xiàn)標簽的遠距離工作,降低標簽的功耗和提高能量利用率是至關(guān)重要的。本論文從改進標簽芯片的時鐘電路和整流電路兩個方面降低標簽的功耗和提高能量利用率,以此實現(xiàn)標簽的遠距離識別。首先論文基于ISO/IEC18000 Type C協(xié)議介紹了RFID UHF系統(tǒng)的通信方式,包括前向鏈路和反向鏈路的能量傳播方式、標簽與閱讀器通信的信息調(diào)制方式和編碼方式,它們?yōu)槟M射頻模塊的設計提供了基本的理論基礎和參考。其次,我們對模擬射頻前端電路的每個子電路進行了設計和研究,同時分析了其優(yōu)缺點。為了實現(xiàn)標簽芯片的低功耗和較高的能量利用率,我們對時鐘電路和整流電路進行了改進,時鐘電路采用張弛振蕩電路,整流電路采用動態(tài)閾值消除技術(shù),最終采用Cadence Spectre工具基于SMIC 0.18umRF工藝對電路進行仿真優(yōu)化,仿真結(jié)果證實改進后的電路可以大幅降低芯片的功耗,同時提高能量的利用率。最后,我們采用SMIC 0.18μm CMOS工藝實現(xiàn)了模擬射頻前端電路的版圖。
[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.
【學位授予單位】：杭州電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN402

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相關(guān)碩士學位論文 前1條

1 雷旭;UHF射頻識別系統(tǒng)中的天線分析與設計[D];西安電子科技大學;2013年

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本文編號：2195188