【摘要】：隨著物聯(lián)網(wǎng)概念的提出,射頻識別(Radio Frequency Identification,RFID)技術(shù)得到了快速的發(fā)展,以RFID技術(shù)為基礎(chǔ)的閱讀器廣泛的應(yīng)用于實際生活中,工作頻段也從低頻、高頻、超高頻到微波頻段都有所覆蓋。RFID閱讀器頻段的多樣性,導(dǎo)致處理數(shù)據(jù)業(yè)務(wù)量的大大增加,因此對多頻段RFID閱讀器的研究和發(fā)展具有非常大的實際價值。本文首先采用鎖相頻率合成技術(shù),實現(xiàn)了一個可調(diào)多頻段本振信號源電路板,證實了多頻段RFID閱讀器的可行性,然后基于可調(diào)多頻段本振信號源電路板的設(shè)計,提出了一種多頻段RFID閱讀器收發(fā)電路結(jié)構(gòu),通過對其硬件和軟件的設(shè)計,實現(xiàn)了多頻段RFID閱讀器收發(fā)電路板,最后搭建了多頻段RFID閱讀器收發(fā)電路測試平臺,并對其進(jìn)行了測試和結(jié)果分析。本文主要內(nèi)容有:(1)采用鎖相頻率合成技術(shù),以ADF4351為核心芯片,提出了可調(diào)多頻段本振信號源的電路結(jié)構(gòu)。在系統(tǒng)電路的硬件設(shè)計中,通過對環(huán)路濾波器和關(guān)鍵信號的仿真,利用高速電路設(shè)計的思想,實現(xiàn)了可同時輸出5路、功率可調(diào)、頻段范圍為35MHz~4.4GHz的本振信號源電路板。最后測試并分析了DDS模塊在30.72MHz輸出的基準(zhǔn)信號頻率和可調(diào)多頻段本振信號源電路板在433MHz、866MHz、915MHz、1830MHz輸出的信號頻率,并均與信號發(fā)生器進(jìn)行了對比,測試結(jié)果證實了多頻段RFID閱讀器的可行性。(2)根據(jù)RFID閱讀器的工作特點,結(jié)合可調(diào)多頻段本振信號源電路的軟硬件設(shè)計結(jié)構(gòu),采用直接上變頻和正交下變頻技術(shù),以ADL5385和ADL5380為核心芯片,提出了一種多頻段RFID閱讀器收發(fā)電路結(jié)構(gòu),利用高速電路設(shè)計的思想,實現(xiàn)了可調(diào)頻段為433MHz和915MHz的收發(fā)電路板。(3)設(shè)計了多頻段RFID閱讀器收發(fā)電路的上位機(jī)界面,實現(xiàn)了上位機(jī)界面與單片機(jī)之間的通信,完成了對DDS模塊、鎖相倍頻模塊、數(shù)字衰減器模塊驅(qū)動程序的編寫。(4)搭建了多頻段RFID閱讀器收發(fā)電路測試平臺,并基于此平臺完成了對收發(fā)電路的信號測試。測試結(jié)果表明,利用上位機(jī)界面,多頻段RFID閱讀器收發(fā)電路板能夠在433MHz和915MHz進(jìn)行多頻段的工作,并且能夠?qū)φ{(diào)制和解調(diào)后的信號功率調(diào)節(jié)30d B的范圍,實現(xiàn)了設(shè)計的預(yù)期目標(biāo)。
[Abstract]:With the development of the concept of Internet of things, RFID (Radio Frequency Identification (Radio Frequency Identification,RFID) technology has been developed rapidly. The reader based on RFID technology is widely used in real life, and the working frequency band is also from low frequency, high frequency. The diversity of RFID reader leads to the increase of data processing traffic, so the research and development of multi-band RFID reader is of great practical value. In this paper, a adjustable multi-band local oscillator signal source circuit board is implemented by using phase-locked frequency synthesizer technology, and the feasibility of multi-band RFID reader is verified. Then, the design of local oscillator signal source circuit board based on adjustable multi-band local oscillator signal source is presented. A multi-band RFID reader transceiver circuit structure is proposed. Through the design of its hardware and software, the multi-band RFID reader transceiver circuit board is realized. Finally, a multi-band RFID reader transceiver circuit test platform is built. It was tested and analyzed. The main contents of this paper are as follows: (1) using phase-locked frequency synthesizer and ADF4351 as the core chip, the circuit structure of the adjustable multi-band local oscillator signal source is proposed. In the hardware design of the system, through the simulation of the loop filter and the key signal, using the idea of high speed circuit design, the local oscillator signal source circuit board which can output 5 channels at the same time, the power can be adjusted, and the frequency range is 35MHz~4.4GHz is realized. Finally, the frequency of the reference signal output by the DDS module in 30.72MHz and the signal frequency of the adjustable local oscillator signal source circuit board in the 433MHz zn 866MHz / 915MHz / 1830MHz are tested and analyzed, and the results are compared with the signal generator. The test results confirm the feasibility of multi-band RFID reader. (2) according to the working characteristics of RFID reader, combined with the hardware and software design structure of adjustable multi-band local oscillator signal source circuit, direct up-conversion and quadrature downconversion technology are adopted. Taking ADL5385 and ADL5380 as the core chips, a multi-band RFID reader transceiver circuit structure is proposed, which uses the idea of high-speed circuit design. A transceiver circuit board with adjustable frequency band of 433MHz and 915MHz is implemented. (3) the upper computer interface of the multi-band RFID reader transceiver circuit is designed, the communication between the upper computer interface and the MCU is realized, and the DDS module and phase-locked frequency-doubling module are completed. The driver of the digital attenuator module is written. (4) A multi-band RFID reader transceiver circuit test platform is built and the signal test of the transceiver circuit is completed based on the platform. The test results show that the multi-band RFID reader transceiver circuit board can work in 433MHz and 915MHz with the upper computer interface, and can adjust the range of 30dB signal power after modulation and demodulation, and achieve the expected goal of the design.
【學(xué)位授予單位】：寧波大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN929.5;TP391.44

【共引文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 王傅強(qiáng);基于物聯(lián)網(wǎng)技術(shù)的供應(yīng)鏈新型管理模式研究[D];中南大學(xué);2012年

相關(guān)碩士學(xué)位論文 前1條

1 倪浩;基于RFID的型式試驗樣品管理系統(tǒng)的設(shè)計與實現(xiàn)[D];華東理工大學(xué);2015年

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本文編號：2333371