Study And Design Of Matched Filtering Network Based On 13.56MHz Radio Frequency Reader

Radio frequency reader is an essential key equipment of RFID (Radio Frequency Identification) system, and is also the source of radio frequency identification systems transmitting radio frequency signals into the air. The performance of the RF reader directly determines the quality of the entire RFID system. In order to avoid the radio signal emitted by radio frequency devices affecting the normal operation of other electrical equipment or having a harmful impact on human health, relevant international standards (such as EN300330, EN301489 etc.) have strict rules to limit the bandwidth, radiation intensity and other parameters of radio frequency identification systems. This requires the reader’s RF output parameters must meet the above standards. RF reader Matched Filtering Network is a key module to determine its RF output parameters. Therefore, to design a Matched Filtering Network which meets the requirements is essential for the whole RFID system.This thesis focuses on 13.56MHz radio frequency reader’s Matched Filtering Network, and proposes a new design method for Matched Filtering Network. The proposed method makes use of circuit simulation and optimization technology instead of the traditional integrated design method. The proposed method effectively avoids extremely complex formula derivation and numerical computation process, and has advantages of flexible design, high accuracy and time efficiency. We detail the design process of the proposed method, and design a Matched Filtering Network which meets the requirements of 13.56MHz RFID readers with this method. According to the test reports given by certification authority in accordance with the relevant requirements of the standard test methods, we demonstrate radio frequency parameters of 13.56MHz RFID reader using the Matched Filtering Network fully comply with requirements of the relevant international standards. The method described in this paper can design a matched filtering network that is fully comply with the 13.56MHz RFID reader’s requirements, and the effectiveness has great significance for the radio frequency readers and even for the entire RFID system’s application and promotion.