摘要射频识别作为一种新兴的自动识别技术,具有体积小、容量大、寿命长、可重复使用等特点,该技术与互联网、通讯等技术相结合,可实现全球范围内物品的跟踪与信息共享。随着该技术的不断发展,其应用领域正日益扩大,已成为当前的热点研究领域,具有广泛的应用前景。
标签成本是RFID技术应用和发展的一大瓶颈,只有降低标签的成本才能广泛地应用。本文对UHF频段无芯片RFID标签的设计和研究就是基于这一背景,由于没有微芯片和片上电源,无芯片RFID标签大大降低了成本。本文的主要内容主要包括以下几个方面:8119
1、首先,论述了RFID系统组成及其工作原理;其次,对普通无源超高频RFID标签的数据传输原理进行了分析。然后,分析了超高频无芯片RFID标签的数据编码方式和系统工作原理。
2、设计一种基于多阻带螺旋滤波器的无芯片RFID标签。它包括一个接收天线,多阻带滤波器和一个发送天线。阅读器发射机发出一个多频信号至标签,无芯片标签中的多阻带滤波器把特定频率的信号变弱,从而创建了频谱,每一个标签拥有唯一的频谱特性也就意着拥有唯一的ID。
关键词 无芯片RFID标签,天线RCS,螺旋滤波器
毕业设计说明书(论文)外文摘要
Title RFID tags and design of multi-stopband filter
Abstract
As an emerging auto identification technology,RFID (Radio Frequency Identification) has the character of small volume,high capacity,long life,reusability and so on. When combining with internet and communication technology,RFID can realize object tracing and information sharing on a global scale.
The cost of transponder is a major bottleneck in the application and development of RFID technology,which can have a wide application only if the cost of transponder reduces. .The research and design of chipless RFID tags in ultra high frequency in this paper is based on this background. The cost of chipless tags generally much lower than that of other tag types due to the absence of the microcontroller and on-board battery source. This paper is organized as follows.
A novel phase-encoded chipless RFID transponder is presented. The transponder comprises three microstrip patch antennas, which are loaded with open circuited with their respective resonant frequency signals, they re-radiate backscattered signals with distinct phase characteristics. This phase information is encoded as hexadecimal bits for the proposed chipless RFID tag.
Keywords: chipless RFID tang, RCS of antenna, spiral resonator