多频段RFID阅读器射频前端关键技术研究
发布时间：2018-11-15 12:58
【摘要】：随着物联网概念的提出,射频识别(Radio Frequency Identification,RFID)技术得到了快速的发展,以RFID技术为基础的阅读器广泛的应用于实际生活中,工作频段也从低频、高频、超高频到微波频段都有所覆盖。RFID阅读器频段的多样性,导致处理数据业务量的大大增加,因此对多频段RFID阅读器的研究和发展具有非常大的实际价值。本文首先采用锁相频率合成技术,实现了一个可调多频段本振信号源电路板,证实了多频段RFID阅读器的可行性,然后基于可调多频段本振信号源电路板的设计,提出了一种多频段RFID阅读器收发电路结构,通过对其硬件和软件的设计,实现了多频段RFID阅读器收发电路板,最后搭建了多频段RFID阅读器收发电路测试平台,并对其进行了测试和结果分析。本文主要内容有:(1)采用锁相频率合成技术,以ADF4351为核心芯片,提出了可调多频段本振信号源的电路结构。在系统电路的硬件设计中,通过对环路滤波器和关键信号的仿真,利用高速电路设计的思想,实现了可同时输出5路、功率可调、频段范围为35MHz~4.4GHz的本振信号源电路板。最后测试并分析了DDS模块在30.72MHz输出的基准信号频率和可调多频段本振信号源电路板在433MHz、866MHz、915MHz、1830MHz输出的信号频率,并均与信号发生器进行了对比,测试结果证实了多频段RFID阅读器的可行性。(2)根据RFID阅读器的工作特点,结合可调多频段本振信号源电路的软硬件设计结构,采用直接上变频和正交下变频技术,以ADL5385和ADL5380为核心芯片,提出了一种多频段RFID阅读器收发电路结构,利用高速电路设计的思想,实现了可调频段为433MHz和915MHz的收发电路板。(3)设计了多频段RFID阅读器收发电路的上位机界面,实现了上位机界面与单片机之间的通信,完成了对DDS模块、锁相倍频模块、数字衰减器模块驱动程序的编写。(4)搭建了多频段RFID阅读器收发电路测试平台,并基于此平台完成了对收发电路的信号测试。测试结果表明,利用上位机界面,多频段RFID阅读器收发电路板能够在433MHz和915MHz进行多频段的工作,并且能够对调制和解调后的信号功率调节30d B的范围,实现了设计的预期目标。
[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.
【学位授予单位】：宁波大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5;TP391.44
本文编号：2333371
[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.
【学位授予单位】：宁波大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5;TP391.44
【共引文献】
相关博士学位论文 前1条
1 王傅强;基于物联网技术的供应链新型管理模式研究[D];中南大学;2012年
相关硕士学位论文 前1条
1 倪浩;基于RFID的型式试验样品管理系统的设计与实现[D];华东理工大学;2015年
，本文编号：2333371
本文链接：https://www.wllwen.com/kejilunwen/wltx/2333371.html
