Abstract
A general view on the problem of designing atypical battery-free, autonomous semi-passive RFID transponders-sensors (autonomous sensors with RFID interfaces) is presented in this review. Although RFID devices can be created in any of the electronic technologies, the design stage must be repeated each time when the manufacturing processes are changed, and their specific conditions have to be taken into consideration when modeling new solutions. Aspects related to the factors affecting the synthesis of semi-passive RFID transponder components on the basis of which the idea of the autonomous RFID sensor was developed are reflected in the paper. Besides their general characteristics, the operation conditions of modern RFID systems and achievements in autonomous RFID sensor technology are revealed in subsequent sections—they include such issues as technological aspects of the synthesis process, designing antennas for RFID transponders, determining RFID chip and antenna parameters, creating the interrogation zone IZ, etc. It should be pointed that the universal construction of an autonomous RFID sensor, which could be use in any application of the automatic object identification system, cannot be developed according to the current state of the art. Moreover, a trial and error method is the most commonly used in the today’s process of designing new solutions, and the basic parameters are estimated on the basis of the tests and the research team experience. Therefore, it is necessary to look for new inventions and methods in order to improve implementations of RFID systems.
Highlights
Radio Frequency IDentification (RFID) systems have been used for years in many socio-economic activity areas and they are more and more frequently being used instead of the popular bar codes [1]
An attempt to systematize the process of synthesizing autonomous sensors with RFID interface has been presented in this paper
The authors have tried to point out problematic cases in many practical and theoretical studies that arise when creating new RFID device constructs
Summary
Radio Frequency IDentification (RFID) systems have been used for years in many socio-economic activity areas and they are more and more frequently being used instead of the popular bar codes [1]. It is mainly determined by the frequency band (LF, HF or UHF) and operating frequency f 0 , due to readers or interrogators—as well as transponders, usually called as RFID tags) depends on many various physical phenomena that constitutes the basis for energy transfer and information exchange factors [1]. Specification: It should be noted that only the basic factors that influence the synthesis of RFID devices and that are discussed in the review are mentioned above This shows how complicated the process of developing new devices of RFID systems is when high object identification efficiency is required. First (Section 2), the elaborated development board of the battery-free autonomous semi-passive RFID transponders-sensors is presented as a research object and the main problems encountered when synthesizing the device are highlighted.
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