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This paper presents a passive 13.56 MHz RFID transponder frontend design using 0.18 µm CMOS Technology for implantable biosensor applications. Power is provided to the system through a dual output full wave rectifier that provides power at two different voltage levels; the low level to the transponder frontend to reduce its power consumption and the high level to the biosensor to increase its dynamic...
The current work addresses the challenge of measuring urine volume in diapers primarily targeting geriatric care applications. There are number of incontinence alarm innovations suggested and described in patents and scientific reports. However, there are hardly any reports of such systems in permanent use in the hospital care market. One reason might be the challenging system requirements of such...
In this work single-antenna detection schemes for collided radio frequency identification (RFID) signals are proposed to achieve waveform separation and extract information when two RFID tags simultaneously transmit. Industry standard Generation 2 (Gen2) tags with FM0 (biphase-space) encoding are fully exploited, including FM0 inherent memory, in sharp contrast to tag separation prior art. It is shown...
In this paper a technologic aid for visually impaired people based on passive low-frequency RFID transponders and its evolution from the first implementation is presented. The system evolution process mainly concerns the adoption of different electronic solutions that took place during the last years in order to produce an independent, fully functional, safe and secure navigation system for blind...
This paper proposes a novel FM0 decoding technique for EPC Class 1 Generation 2 (Gen 2) UHF RFID readers. The proposed decoder overcomes the limitations of current implementations, which focus on correlation based decoding and require complex synchronization schemes. New rectangular wave symbols are derived from the FM0 stream and mapped to corresponding bit sequences using duty cycle estimations...
This paper discusses the evolution towards integrated RFID-enabled wireless sensor network infrastructure using UHF and microwave frequencies. Inkjet-printed technology on flexible paper substrates and the integration (assembly) of sensors, wireless modules, discrete components and power sources is proposed as a solution for low-cost, light-weight, and environmental friendly method for RFID-enabled...
When the RFID Technology is applied to vehicular identification, the objective is to have all the motor vehicle information inside the memory tag, and actually, it is limited to owner name, license, fines, etc. So, the focus of this work is to present some results of the experimental tests and measurements taken in the field and in the electromagnetic compatibility laboratory, from that, hint some...
This study measured the reading reliability of UHF passive tags for Document Tracking. The main goal was verifying whether UHF RFID technology that relaxes the constraints of distance reading with respect to HF, is suitable for automating document workflow. A set of experiments was conducted using three types of commercial tags to verify how the reader's power and the spatial arrangement of tags may...
In this paper an experimental test bed for the measurement of RFID tag antennas, inside pipes filled with liquids, is presented. The test bed has been specifically designed to characterize fixed or mobile tags, deployed in distribution pipes to monitor their conditions. Applying some hydraulic tricks, it is possible to connect the antenna to an external network analyser even if the liquid in the pipe...
This paper presents a nonius-based time-to-digital converter (TDC) for its use as part of a RFID tag sensor. The TDC can digitize any physical magnitude previously converted to time delay and it exploits the benefits of time domain conversion: high resolution with reduced power consumption and low voltage operation. A high level study is carried out to analyze the feasibility of the nonius-based TDC...
Firstly, due to the characteristics of the tourist attractions, galleries and museums in China, a systematic RFID Application Platform for the tour and exhibition area is presented in this paper. This systematic RFID Application Platform can successfully support the implementation of four typical RFID application subsystems simultaneously. These four application subsystems can provide intelligent...
On behalf of the Organizing Committee of the 2011 IEEE RFID Technologies and Applications (RFID-TA) Conference, I have the privilege of inviting you to Sitges, Spain. It is the second edition of the RFID-TA Conference and the first time that it is held in Europe. Please join us in September 15–16, 2011 at Hotel Melia, in the heart of the Aiguadolç marina of the cosmopolitan city of Sitges, Spain.
Wireless Sensor Networks (WSNs) usually consist of battery-powered nodes. Therefore, once the batteries deplete, the networks collapse. Passive sensor nodes are immune to this kind of problem because they do not have batteries, but on the other hand, their range is significantly shorter. This paper shows that this range can be enhanced (in a noticeable manner) if the Radio Frequency (RF) source that...
Passive, backscatter radio frequency identification (RFID) systems are often range limited by the power incident on the radio frequency (RF) tag. We have demonstrated an increase in the power incident on the RF tag using transmit diversity in a monostatic backscatter channel. Transmit diversity was achieved by phase conjugating the forward link of the backscatter channel associated with each reader...
Sensing of pH with single-use gamma sterilizable sensors is needed in single-use bioprocess components. In this study, we explored pH sensing films based on polyaniline (PANI) that were deposited onto our recently developed passive radio-frequency identification (RFID) sensors. Two main strategies for developing pH sensitive PANI films involved doping PANI with camphorsulfonic acid (CSA) and poly...
The Internet of Things is a concept of connecting small real space physical objects to the Internet using sensor network, RFID, and other forms of wireless network technologies. In this paper, we present an EPC (Electronic Product Code) based Internet of Things (IoT) architecture. The key concept of the architecture is EPC network over heterogeneous access network. We particularly focused on a ZigBee...
This paper reports the feasibility study of a novel passive tag for μRFID applications in the worldwide available free 60-GHz band. The feasibility analysis indicates that a passive fully-integrated μRFID tag, with on-chip antenna, can be realized in 65-nm SOI CMOS technology at 60 GHz with an operating range of about 20 cm. The 65-nm SOI CMOS technology represents a good candidate due to its better...
In this paper the influence of fibre-reinforced plastic (FRP) composite materials on passive high frequency (HF) radio frequency identification (RFID) systems is evaluated. Firstly, a simulation model of a fabricated antenna coil has been developed. Furthermore, a carbon-FRP (CFRP) composite material sample has been characterized by measurements and the obtained parameters have been also included...
In this paper we solve analytically the problem of distributing optimally a set of t slots between two readers in RFID dense environments. In these environments only one reader can transmit simultaneously, otherwise they would interfere each other, and tag identification would not be possible. This problem is addressed considering both static and dynamic frame length readers. The goal was to maximize...
This paper presents a full-duplex communication for high-frequency RFID at 13.56 MHz. The work presented in this study is based on the ISO 14443 very high bitrate (VHBR) modulations, which are defined for a half-duplex communication scheme. Moreover, these modulations appear to be orthogonal when transmitted simultaneously over the same carrier. The aim of this system is to use the VHBR modulations...
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