Research and development of new UHF-RFID tags

Radio Frequency Identification technology, also known as Radio Frequency Identification, mainly USES Radio Frequency Identification to identify and read electronic tags on the target to obtain target information. Its advantages are fast, accurate and do not require contact with the target object. Among them, UHF-RFID technology has been paid great attention in the field of Internet of things due to its characteristics such as long reading distance, high-speed moving object recognition and multi-object recognition. However, the existing UHF - usually adopt the RFID electronic tag antenna type dipole substructure, although this structure can basically meet the demand of common applications, but in some special requirements (such as bandwidth demands, small size, metal environmental requirements, etc. applications, the impedance matching, radiation efficiency, character such as pattern will change, leading to label work performance, can't even use. In order to solve the problem of different performance requirements for UHF-RFID tags in special applications, this paper studies and designs a variety of new tags based on UHF-RFID. The research contents of this paper are summarized as follows:

(1) this paper first introduces the background of the subject research, summarizes the research status and development trend of electronic tags, and analyzes the working principle of RFID, including design theory, optimization method and processing technology. The reason of designing new electronic label mark is given.

(2) in order to meet the label on a global scale can use this application purpose, using the straight-line combined with equivalent dipole dipole substructure substructure method, designed a cover all countries and regions, RFID frequency ultra-wideband electronic tag antenna and chooses RFID chips, constitutes a new passive full frequency electronic tag system. In this paper, detailed theoretical analysis, chip introduction and simulation results are given.

(3) In any case, the service life and reading distance of an electronic tag are important indicators to measure the performance of a tag. In order to meet the requirements of both long distance and long life, the power Assisted Tag BAP (volt-lift-tag) is developed on the basis of the active and Passive label systems. Based on the detailed study of BAP system, this paper designed a BAP label based on EM4235 chip, gave the connection mode, equivalent circuit, circuit performance analysis, and the test results and application analysis.

(4) Combined with the design of this paper, this paper analyzes the current industrial development situation of RFID, and the author puts forward the prospect and some Suggestions for the future development of RFID industry.