| 1. |
- Amin, Yasar, et al.
(författare)
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Design and Analysis of Efficient and Compact Antenna for Paper Based UHF RFID Tags
- 2008
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Ingår i: ISAPE 2008. - NEW YORK : IEEE. - 9781424421923 ; , s. 62-65
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Konferensbidrag (refereegranskat)abstract
- Paper substrate is one of the paramount nominees for Radio Frequency Identification (RFID) tags but at the same time it is extremely prone towards environmental changes. In this paper, antennas for UHF RFID tags on paper based substrate are investigated and analyzed for the first time to evaluate the effect of change in dielectric constant on the antenna parameters and performance. On the basis of analysis a concrete meander line antenna is proposed, designed and evaluated which has tremendous immunity towards variation in dielectric constant.
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| 2. |
- Amin, Yasar, et al.
(författare)
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Design and Characterization of Efficient Flexible UHF RFID Tag Antennas
- 2009
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Ingår i: 2009 3RD EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION. - NEW YORK : IEEE. - 9781424447534 ; , s. 2682-2684
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Konferensbidrag (refereegranskat)abstract
- In this paper meander line antennas with end tip loading, designed for UHF RFID tags are presented. These novel antennas are screen printed on Kapton HN for European frequency band (866-868 MHz) and for North American frequency band (902-928 MHz). Asahi ink is used for screen printing of 25 mu m thick antenna traces which remains conductive even after several times sharp bending of these tag antennas. The results show that the antennas exhibit high performance regarding smaller area, high realized gain and better return loss in the frequency band of interest. These antennas are extremely flexible which give autonomy for their applications.
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| 3. |
- Amin, Yasar, et al.
(författare)
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Electromagnetic Analysis of Radio Frequency Identification Antennas for Green Electronics
- 2013
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Ingår i: Electromagnetics. - : Informa UK Limited. - 0272-6343 .- 1532-527X. ; 33:4, s. 319-331
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Tidskriftsartikel (refereegranskat)abstract
- This article demonstrates in-depth electromagnetic analysis of a radio frequency identification tag antenna manufactured by inkjet printing technology on different paper substrates to achieve ultra-low cost flexible radio frequency identification tags using a novel hole-matching technique for reducing the consumption of substrate material, and conductive ink. Nevertheless, the electromagnetic properties of the paper substrate are vulnerable to various environmental effects. Thus, the proposed antenna design is optimized for consistent wideband performance throughout the complete UHF radio frequency identification band (860960 MHz) while presenting a greater degree of material insensitivity. An advanced antenna design methodological analysis is performed to accomplish an extended read range, while exhibiting benchmarking results when across cardboard cartons filled with metal or water containing objects.
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| 4. |
- Amin, Yasar, et al.
(författare)
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Inkjet Printed Paper Based Quadrate Bowtie Antennas For UHF RFID Tags
- 2009
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Ingår i: 11TH INTERNATIONAL CONFERENCE ON ADVANCED COMMUNICATION TECHNOLOGY, VOLS I-III, PROCEEDINGS, - UBIQUITOUS ICT CONVERGENCE MAKES LIFE BETTER!. - TAEJON : ELECTRONICS TELECOMMUNICATIONS RESEARCH INST. - 9788955191387 ; , s. 109-112
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Konferensbidrag (refereegranskat)abstract
- Paper substrate is one of the paramount nominees for Radio Frequency Identification (RFID) tags, for the reason that it is one of the widely and the cheapest available substrates. In this paper, for the first time quadrate bowtie antennas with round corners [1] are realized and analyzed on paper substrate for UHF RFID tags. These inkjet printed antennas exhibit high performance which give freedom for their applications. Their area is smaller than the general triangle bowtie antenna and have advantages of smaller area, better return loss in high frequency and higher gain in normal direction of antenna plane compared with general triangular bowtie antenna.d
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| 5. |
- Amin, Yasar, et al.
(författare)
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Low Cost Paper Based Bowtie Tag Antenna for High Performance UHF RFID Applications
- 2009
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Ingår i: NANOTECH CONFERENCE & EXPO 2009, VOL 1, TECHNICAL PROCEEDINGS - NANOTECHNOLOGY 2009. - BOCA RATON : CRC PRESS-TAYLOR & FRANCIS GROUP. - 9781439817827 ; , s. 538-541
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Konferensbidrag (refereegranskat)abstract
- Radio frequency identification (RFID) antenna's versatility in terms of complete coverage of UHF RFID band (860-960 MHz), while keeping the cost factor low, is an important aspect of today's growing demand for security and tracking of multiple objects in a very short time in addition to tag's readability across the globe. This paper presents a novel inkjet printed rounded corner bowtie antenna with T-matching stubs on paper substrate which is the cheapest and widest available substrate. The antenna exhibits compact size with outstanding read range.
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| 6. |
- Kanth, Rajeev Kumar, et al.
(författare)
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Evaluating Sustainability, Environmental Assessment and Toxic Emissions during Manufacturing Process of RFID Based Systems
- 2011
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Ingår i: Dependable, Autonomic and Secure Computing (DASC), 2011 IEEE Ninth International Conference on. - 9781467300063 ; , s. 1066-1071
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Konferensbidrag (refereegranskat)abstract
- The present state of the art research in the direction of embedded systems demonstrate that analysis of life-cycle, sustainability and environmental assessment have not been a core focus for researchers. To maximize a researcher's contribution in formulating environmentally friendly products, devising green manufacturing processes and services, there is a strong need to enhance life-cycle awareness and sustainability understandings among embedded systems researchers, so that the next generation of engineers will be able to realize the goal of a sustainable life-cycle. In this work an attempt has been made to investigate and evaluate the life-cycle management and environmental assessment in fabricating processes of the RFID based systems. We have chosen a general life cycle assessment approach which involves the collection and evaluation of quantitative data on the inputs and outputs of materials and energy associated with the RFID based systems. Based on the developed generic models, we have obtained the results in terms of environmental emissions for a production of paper substrate printed RFID antennas. We also make an attempt to raise several sustainability issues and quantify the toxic emissions during the manufacturing process.
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| 7. |
- Li, Jiantong, et al.
(författare)
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Ink-jet printed thin-film transistors with carbon nanotube channels shaped in long strips
- 2011
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Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 109:8, s. 084915-
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Tidskriftsartikel (refereegranskat)abstract
- The present work reports on the development of a class of sophisticated thin-film transistors (TFTs) based on ink-jet printing of pristine single-walled carbon nanotubes (SWCNTs) for the channel formation. The transistors are manufactured on oxidized silicon wafers and flexible plastic substrates at ambient conditions. For this purpose, ink-jet printing techniques are developed with the aim of high-throughput production of SWCNT thin-film channels shaped in long strips. Stable SWCNT inks with proper fluidic characteristics are formulated by polymer addition. The present work unveils, through Monte Carlo simulations and in light of heterogeneous percolation, the underlying physics of the superiority of long-strip channels for SWCNT TFTs. It further predicts the compatibility of such a channel structure with ink-jet printing, taking into account the minimum dimensions achievable by commercially available printers. The printed devices exhibit improved electrical performance and scalability as compared to previously reported ink-jet printed SWCNT TFTs. The present work demonstrates that ink-jet printed SWCNT TFTs of long-strip channels are promising building blocks for flexible electronics.
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| 8. |
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| 9. |
- Shao, Botao, et al.
(författare)
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A reconfigurable chipless RFID tag based on sympathetic oscillation for liquid-bearing applications
- 2011
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Ingår i: 2011 5th IEEE International Conference on RFID, RFID 2011. - : Institute of Electrical and Electronics Engineers (IEEE). ; , s. 170-175
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper reports on the development of a 10-bit chipless RFID tag on flexible plastic substrate. This tag is based on sympathetic oscillations of a group of LC circuits with different resonant frequencies. Sophisticated designs including the placement of capacitors involved in each LC circuit, and various LC combinations are examined for the trade-off of the readability and the tag sizes. Moreover, the antennas for detecting the proposed tags are presented. The measurement results show that the proposed tag possesses remarkable readability for a read range up to 21 cm and more importantly, it is suited for tagging liquid-bearing containers, which are widely used in food and medical industries. In addition, this tag is reconfigurable on circuit level, enabling a potential pathway towards the realization of low cost RFID tags for HF/VHF band applications.
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| 10. |
- Shao, Botao, et al.
(författare)
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An ultra-low-cost RFID tag with 1.67 Gbps data rate by ink-jet printing on paper substrate
- 2010
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Ingår i: 2010 6th IEEE Asian Solid-State Circuits Conference, A-SSCC 2010. ; , s. 109-112
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- A fully metallic ink-jet printed passive chipless RFID tag on paper substrate is presented. The tag consists of an ultra-wide-band antenna, a microstrip transmission line with distributed shunt capacitors as information coding element which is reconfigurable by ink-jet printing process. Tapered microstrip line is employed to overcome the limitations of low conductivity and thin film thickness of ink-jet printed metal tracks. Measurement results show that the tag features a robust readability over 80 cm reading distance and a high data rate of 1.67 Gb/s.
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| 11. |
- Shao, Botao, et al.
(författare)
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Chipless RFID tags fabricated by fully printing of metallic inks
- 2013
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Ingår i: Annales des télécommunications. - : Springer Science and Business Media LLC. - 0003-4347 .- 1958-9395. ; 68:7-8, s. 401-413
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Tidskriftsartikel (refereegranskat)abstract
- This paper reviews recent advances in fully printed chipless radio frequency identification (RFID) technology with special concern on the discussion of coding theories, ID generating circuits, and tag antennas. Two types of chipless tags, one based on time-domain reflections and the other based on frequency domain signatures, are introduced. To enable a fully printed encoding circuit, linearly tapering technique is adopted in the first type of tags to cope with parasitic resistances of printed conductors. Both simulation and measurement efforts are made to verify the feasibility of the eight-bit fully printed paper-based tag. In the second type of tags, a group of LC tanks are exploited for encoding data in frequency domain with their resonances. The field measurements of the proof-of-concept of the tag produced by toner-transferring process and flexible printed circuit boards are provided to validate the practicability of the reconfigurable ten-bit chipless RFID tag. Furthermore, a novel RFID tag antenna design adopting linearly tapering technique is introduced. It shows 40 % save of conductive ink materials while keeping the same performance for conventional half-wave dipole antennas and meander line antennas. Finally, the paper discusses the future trends of chipless RFID tags in terms of fabrication cost, coding capacity, size, and reconfigurability. We see that, coupled with revolutionary design of low-cost tag antennas, fabrication/reconfiguration by printing techniques, moving to higher frequencies to shrink tag sizes and reduce manufacturing cost, as well as innovation in ID generating circuits to increase coding capacities, will be important research topics towards item-level tracking applications of chipless RFID tags.
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| 12. |
- Shao, Botao, et al.
(författare)
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CONFIGURABLE INK-JET-PRINTED RFID TAG ON PAPER SUBSTRATE FOR LOW COST AND GREEN APPLICATIONS
- 2011
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Ingår i: Microwave and optical technology letters (Print). - : Wiley. - 0895-2477 .- 1098-2760. ; 53:12, s. 2781-2786
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Tidskriftsartikel (refereegranskat)abstract
- The letter presents the design, fabrication, and measurement of a configurable radio frequency identification (RFID) tag based on time-domain reflections. The tag circuit contains a microstrip line (ML) that propagates radio frequency (RF) signals, and a group of capacitors that introduce impedance discontinuities to encode binary codes. The configurability of the tag circuit is allowed by connecting the nearby-placed capacitors with the ML. Ink-jet printing technology is employed to implement the layout of the proposed tag on paper substrate. To overcome the limitations of printed metallic tracks, a linearly tapering technique is proposed. With this technique, a four-bit configurable passive chipless RFID tag is realized. Both time-domain reflectometry (TDR) measurements and ultrawideband (UWB) characterizations were conducted for the proposed tag, and the results are in good consistence with the simulation ones from the circuit simulator advanced design system (ADS). Owing to its low cost fabrication and environmentally friendly nature, the proposed tag has great potential to be widely employed in low-end RFID applications. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53: 2781-2786, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26412
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| 13. |
- Shao, Botao, et al.
(författare)
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Design of fully printable and configurable chipless RFID tag on flexible substrate
- 2012
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Ingår i: Microwave and optical technology letters (Print). - : Wiley. - 0895-2477 .- 1098-2760. ; 54:1, s. 226-230
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Tidskriftsartikel (refereegranskat)abstract
- This article presents the design and implementation of a chipless radio frequency identification (RFID) tag on flexible substrate.The tag is designed based on the sympathetic oscillations of multiple LC (inductor–capacitor) circuits that possess distinct resonant frequencies. Information is encoded by controlling placement of these resonant frequencies. To trade off the readability and size of the tag, the optimizations including capacitor placements and different LC combinations are studied. The tag is then realized onto flexible polyimide substrate using toner-transferring process. The detection system is also constructed and used to measure the proposed tag. The measurement results show that the tag can provide an excellent readability more than 20 cm reading range. In addition, this tag is fully printable and configurable, hence making it more feasible and considerably cheaper to be used. This tag can provide a meaningful approach toward the realization of ultralow-cost RFID tags attached onto low-value items.
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| 14. |
- Shao, Botao, et al.
(författare)
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Directly Printed Packaging-Paper-Based Chipless RFID Tag With Coplanar LC Resonator
- 2013
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Ingår i: IEEE Antennas and Wireless Propagation Letters. - 1536-1225 .- 1548-5757. ; 12, s. 325-328
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Tidskriftsartikel (refereegranskat)abstract
- This letter presents the design, simulation, fabrication, and characterization of an LC-resonator-based chipless RFID tag. The ID-generating circuit is designed based on a reconfigurable LC resonance circuit. Phase position modulation (PPM) coding is used for the enhancement of the coding capacity. The tag has been realized on packaging paper using all printing technique. In fabrication, overprinting process has been investigated as an effective pathway for the improvement of the conductivities. The tag with 4.25-bit coding capacity has been examined using a sweeping frequency signal transmitted from a vector network analyzer, and experimental results confirm the feasibility of the proposed chipless tag. With further optimizations, the tag can be used in the item-level tracking and identification applications, especially for the management of paper tickets and banknotes.
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| 15. |
- Shao, Botao, 1981-
(författare)
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Fully Printed Chipless RFID Tags towards Item-Level Tracking Applications
- 2014
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- An ID generating circuit is unquestionably the core of a chipless RFID tag. For convenience of printing process and cost consideration, the circuit should be kept as simple as possible. Based on the cognition, an 8-bit time-domain based ID generating circuit that merely consists of a ML and eight capacitors was offered, and implemented on photo-paper substrates via inkjet printing process. In addition to the experimental measurements, the circuit was also input into circuit simulators for cross-validation. The good agreement between simulations and measurements is observed, exhibiting the tag technical feasibility. Besides of low cost, the tag has wide compatibility with current licensed RFID spectrum, which will facilitate the future deployment in real applications.Compared to time-domain based chipless tags, frequency signatures based chipless RFID tags are expected to offer a larger coding capacity. As a response, we presented a 10-bit frequency-domain based chipless RFID tag. The tag composed of ten configurable LC resonators was implemented on flexible polyimide substrate by using fast toner-transferring process. Field measurements revealed not only the practicability of the tag, but also the high signal to noise ratio (SNR). Another frequency domain tag consists of a configurable coplanar LC resonator. With the use of all printing process, the tag was for the first time realized on common packaging papers. The tag feasibility was confirmed by subsequent measurements. Owing to the ultra-low cost potential and large SNR, The tag may find wide applications in typical RFID solutions such as management of paper tickets for social events and governing of smart documents.Ultra wide band (UWB) technology possesses a number of inherent merits such as high speed communication and large capacity, multi-path immunity, accurate ranging and positioning, penetration through obstacles, as well as extremely low-cost and low- power transmitters. Thus, passive UWB RFIDs are expected to play an important pole in the future identification applications for IoT. We explained the feature difference between UWB chipless tags and chip based tags, and forecasted the applications respectively based on the comparison between the two technologies. It is expected that the two technologies will coexist and compensate each other in the applications of IoT.Lastly, the thesis ends up with brief summary of the author’s contributions, and technical prospect for the future development of printable chipless RFID tags.
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| 16. |
- Shao, Botao, et al.
(författare)
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High Frequency Characterization and Modelling of Inkjet Printed Interconnects On Flexible Substrate for Low-Cost RFID Applications
- 2008
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Ingår i: ESTC 2008. - NEW YORK : IEEE. - 9781424428137 ; , s. 695-699
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Konferensbidrag (refereegranskat)abstract
- This paper presents the characterization and modeling of inkjet printed interconnects on flexible polyimide substrate using nano-paticle silver ink for low-cost RFID applications. Then TDR/TDT and S-parameter measurements are performed at high frequency from 30 kHz to 6 GHz. A Jumped equivalent circuit and distributed parameter model of the printed interconnects have been developed for the realization of the full printed RFID tags. Additionally the related electrical properties of the printed interconnects are extracted.
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| 17. |
- Shao, Botao, et al.
(författare)
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High frequency characterization of inkjet printed coplanar waveguides
- 2008
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Ingår i: 2008 IEEE Workshop On Signal Propagation On Interconnects. - 9781424423170 ; , s. 170-173
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Konferensbidrag (refereegranskat)abstract
- This work is focused on frequency domain electrical characterization of ink-jet printed coplanar waveguides (CPWs). The waveguides were designed and printed using conductive nano-silver ink at room temperature and sintered at 300 degrees C. Distributed models, dependent on frequency, have been developed and some relevent parameters such as impedance, attenuation, are derived over frequency band from 30 kHz to 6 GHz. Two different widths of ground planes are investigated to examine the effects on CPW high frequency behaviors. In addition to these the obtained parameters have been compared and validated by theoretical calculations and momentum simulations.
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| 18. |
- Shao, Botao, et al.
(författare)
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Linearly-tapered RFID tag antenna with 40% material reduction for ultra-low-cost applications
- 2011
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Ingår i: 2011 IEEE International Conference on RFID. ; , s. 45-49
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The development of RFID technology are requiring high performance and low cost tag antennas than ever before. To meet these demands, linear tapering technique is firstly proposed in the design of planar tag antennas. With this strategy, the current distribution along antenna arms is effectively assigned by varying the antenna line width. Compared with conventional ones, the tapered antennas can reduce the material cost by over 40% not only for PCB (Printed Circuit Board) processed, but also for ink-jet printing produced dipole and meander line antennas, while they still maintain comparable performance. With an identical volume of conducting material, the tapered antennas can achieve better radiation performance than non-tapered ones on antenna gains and radiation efficiencies. The method has been successfully verified by applying it onto 869 MHz and 2.45 GHz antennas. The influence of the tapering technique on antenna bandwidth is also investigated.
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| 19. |
- Shao, Botao, et al.
(författare)
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Process-dependence of inkjet printed folded dipole antenna for 2.45 GHZ RFID tags
- 2009
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Ingår i: 2009 3RD EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION, VOLS 1-6. - NEW YORK : IEEE. - 9781424447534 ; , s. 2336-2339
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Konferensbidrag (refereegranskat)abstract
- This paper focuses on the process dependence of an inkjet printed folded dipole antenna based on practical parameters in a typical inkjet printing process. We present the effect of width variations and number of overprinting times on the antenna properties such as gain, radiation efficiency and input impedance. Furthermore we investigate the read range degradation of the tag on which the antenna is attached, due to width or thickness variations. In addition, an comparison between an inkjet printed antenna on a regular paper substrate and a copper antenna on Printed Circuit Board (PCB) was made, manifesting the strong competitiveness of the printed silver antenna as a low cost solution.
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| 20. |
- Zheng, Linlin, et al.
(författare)
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Design and implementation of a fully reconfigurable chipless RFID tag using inkjet printing technology
- 2008
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Ingår i: Proceedings - IEEE International Symposium on Circuits and Systems. - 9781424420780 ; , s. 1524-1527
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Konferensbidrag (refereegranskat)abstract
- In this paper, a novel fully reconfigurable chipless RFID tag has been presented. 8-bit data are encoded by impedance mismatches along transmission line. Inkjet printing is used to reconfigure for special tag IDs. By integrating inkjet printing technology, printable tags are not only economically feasible but also technically efficient. The remarkable idea has been successfully validated both by simulation and experimental measurements.
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| 21. |
- Zou, Zhuo, et al.
(författare)
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Design and demonstration of passive UWB RFIDs : Chipless versus chip solutions
- 2012
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Ingår i: RFID-Technologies and Applications (RFID-TA), 2012 IEEE International Conference on. - : IEEE. - 9781467346566 ; , s. 6-11
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Konferensbidrag (refereegranskat)abstract
- This paper reviews recent research on Ultra-Wideband (UWB) techniques for the next generation Radio Frequency IDentification (RFID) towards the Internet-of-Things (IoT), conducted by Vinn iPack Center at KTH, Sweden. First, we introduce an inkjet printed chipless UWB RFID for ultra-low cost applications such as item-level tracking. The identification number is coded by variations of the impedance over the transmission line, resulting in the OOK modulated data by means of pulse reflections in time domain. Prototypes were fabricated and measured for 4-bit tag and 8-bit tag, respectively. Thanks to the employment of fully printing process and paper substrates, the tag is potentially ultra-low cost in volume production. Second, a wirelessly powered RFID tag with an active UWB transmitter is studied for advanced applications such as wireless positioning and sensing. The tag is powered by UHF continuous waves, whereas it uses an UWB pulse generator to transmit data to the reader. It ensures the improved coverage and accurate positioning over traditional backscattering UHF tags. UWB readers, positioning, and sensing are also discussed in a system perspective. The two solutions reveal that UWB is a viable alternative to existing passive RFIDs adapting both low-cost applications and high-performance sensing and positioning applications.
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