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  • 51.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Jonsson, Peter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Printed RFID tag antennas with minimal performance degradation when bent2003In: Proceedings of Asia Pacific Microwave Conference 2003, APMC'03, Seoul, South Korea, November 4-7, 2003., 2003Conference paper (Other academic)
  • 52.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Jonsson, Peter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Olsson, Torbjörn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Wang, Gang
    Performance Degradation of RFID System due to the Distortion in RFID Tag Antenna2001In: CriMiCo 2001 - 11th International Conference, Institute of Electrical and Electronics Engineers (IEEE), 2001, p. 371-373, article id 1173865Conference paper (Refereed)
    Abstract [en]

    In some of the radio-frequency identification (RFID) applications, RFID tag antennas will be printed onto flexible substrates. Sticked onto different surfaces, geometric distortion of the tag antenna, such as bending of the tag, could occur due to antenna substrate flexibility. In the present paper performance degradation due to such distortion of an RFID system, using the common half-wave dipole antennas usually used in tags, is simulated. It is shown that degradation of RFID system performance in terms of operating range due to such distortion is significant and that antenna structures less sensitive for this deformation should be considered for RFID systems where this kind of effect may occur.

  • 53.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Gulliksson, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    The "Smart" Diaper Moisture Detection System2004In: 2004 IEEE MITT-S International Microwave Symposium Digest, Jun 6-11 2004, Fort Worth, TX, United States, IEEE , 2004, p. 659-662Conference paper (Refereed)
  • 54.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Gulliksson, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    An Action Activated and Self Powered Wireless Forest Fire Detector2007In: IFIP International Federation for Information Processing, Springer, 2007, Vol. 248, p. 47-58Conference paper (Refereed)
    Abstract [en]

    Placing fire detectors in a forest is usually associated with powering problems since the sensors do not have access to external power supply and a periodical change of internal batteries is an undesired option. This paper presents an approach where the fire sensor itself, when heated by nearby fire, generates electrical energy to power a radio transmitter. Presented energizing fire sensor is environmentally friendly and can be mass produced at a very low cost. Upon activation the sensor produces enough power necessary to operate most standard radio transmitters depending on what communication system is chosen for operation. The fire detector unit can be deployed from either helicopter or manually from the ground. The sensor can be designed to activate itself at different temperatures to suit different climate zones.,Rough guidelines are given for estimation of attenuation of radio wave propagation in forest areas in order to predict maximum transmit distance.

  • 55.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Lee, Bruce
    Ganjei, John
    On the Efficiency of RFID Tag Antennas Produced by Copper Plating Catalytic Ink Traces2008In: ECWC 11, Electronic Circuits World Convention, March 17-19, 2008, Shanghai, 2008Conference paper (Refereed)
  • 56.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    An Electrically Small Elliptic PIFA for RFID in Harsh Metallic Environments2013In: 2013 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2013, 2013, Art. no. 6685309-, IEEE conference proceedings, 2013, , p. -Conference paper (Refereed)
    Abstract [en]

    To remotely identify a metallic object with an RFID tag it is required that the tag’s antenna consists of more than one layer of conducting material, where one layer can comprise the metallic object itself, or alternatively one can use the object itself to make a slot antenna. Tag antennas are also seldom smaller than about ¼ of a wavelength. This paper presents a capacitively fed PIFA for passive UHF RFID wherethe radiating element has received elliptical geometry and is placed inside a circular metallic cup that constitutes the tagantenna’s boundary conditions and is protected by a top layer ofan extremely hard plastic material that also works as a superstrate. The elliptic radiating patch has length of only 0.068 wavelengths and with its cup it has total antenna diameter of0.084 wavelengths and total antenna height 0.016 wavelengths.The final RFID tag can be placed upon a metallic or non-metallicsurface or immersed into the same to create an overall flat surface, as long as it is optimized for the specific situation.

  • 57.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Printed RFID Antennas: Adaption to Background Materials2006In: Antenn 06, 30 May-1 June, in Linköping, 2006Conference paper (Other scientific)
  • 58.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    RFID Antennas – Possibilities and Limitations2010In: Radio Frequency Identification Fundamentals and Applications, Design Methods and Solutions / [ed] Vedran Kordic, Vienna: IN-TECH, 2010, p. 69-92Chapter in book (Other academic)
  • 59.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Koptyug [Koptioug], Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Olsson, Torbjörn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    A Distanced RFID Dipole for a Metallic Supply Chain Label2006In: 2006 IEEE Antennas and Propagation Society International Symposium, 9-14 July 2006 , Albuquerque, NM, USA, 2006, p. 3229-3232Conference paper (Refereed)
  • 60.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Olsson, Torbjörn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Reduced Amount of Conductive Ink with Gridded Printed Antennas2005In: Polytronic 2005: 5th International Conference on Polymers and Adhesives in Microelectronics and Photonics - Proceedings, Piscataway, NJ: IEEE conference proceedings, 2005, p. 86-89, article id 1596493Conference paper (Refereed)
    Abstract [en]

    It becomes more and more common to print tag antennas using electrically conductive ink for mass-produced Radio Frequency IDentification (RFID) tags. Electrical properties of the ink are mostly determined by conductive (e.g. silver) particles mixed into the ink solution. Since silver is relatively expensive it is desirable to minimize the amount of ink used per antenna. This paper illustrates how the printed conductor area of the antenna can be reduced by applying a grid pattern to an existing antenna geometry and to what extent the gridding can be performed without significantly degrading of the antenna electrical properties. Two common antenna structures are used as an example. It is also shown that by slightly modifying the original antenna geometry it is possible to even further reduce the amount of used ink.

  • 61.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Skerved, Vincent
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Andersson, Henrik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Sensing and Actuating with NFC2015Conference paper (Refereed)
    Abstract [en]

    Near Field Communication (NFC) is currently being widely launched as a new wireless feature in cell phones, allowing NFC equipped phones to act as 13.56 MHz RFID readers or as tags as well as to utilize NFC for short range inter-phone communication. While many applications based on the most basic NFC cell phone technology have started to appear, this work addresses the possibility to not only retrieve static data such as ID numbers and web addresses from NFC tags but also sensor data. The work shows how commercially available NFC chips can be used for communicating sensor data to a smart phone, either directly through existing analogue input ports or by powering and communicating with an additional microcontroller. The work also shows how an NFC tag can operate as an actuator rather than a sensor, which is exemplified by the construction of a bi-stable switch capable of switching 250 Volt / 2 Ampere. Power transfer capability via the NFC interface is characterized with coils designed for different resonant frequencies as is inkjet printed coils on paper substrate where components are soldered with a low temperature solder compound.

  • 62.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Skerved, Vincent
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Forsström, Stefan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Gao, Jinlan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Kanter, Theo
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Gulliksson, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Home Care with NFC Sensors and a Smart Phone2011In: ACM International Conference Proceeding Series, ACM Press, 2011Conference paper (Refereed)
    Abstract [en]

    The world's aging population and limited hospital resources together with advancements in information technology provides a thorough basis for further development of tele-healthcare and assisted living. For ordinary people, and especially elderly people, to be diagnosed and treated in their homes there is a definite need for technical equipment that is extremely easy to handle. One way to facilitate tele-healthcare is to take advantage of modern cell phone technology and the infrastructure surrounding these units. Many elderly people are today comfortable with using cell phones and even advanced smart phones can be purchased to a cost that is low compared to corresponding specialized medical equipment. The concept presented in this work is based upon Near Field Communication (NFC), a wireless feature that is currently being widely launched in cell phones. Amongst other capabilities, NFC technology allows a phone to act as a 13.56 MHz RFID reader. This work shows how NFC-equipped phones can be used to read passive NFC tags that in turn are equipped with general resistive sensors and how sensor data are read and communicated to a web server without the need to push a single button. © 2011 ACM.

  • 63.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Wang, Gang
    Univ Sci & Technol China, Dept Elect Engn & Informat Sci, Hefei 230027, Peoples R China.
    Wang, Lu
    Univ Sci & Technol China, Dept Elect Engn & Informat Sci, Hefei 230027, Peoples R China.
    Design of High-Directivity Wideband Microstrip Directional Coupler With Fragment-Type Structure2015In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 63, no 12, p. 3962-3970Article in journal (Refereed)
    Abstract [en]

    A novel design for a microstrip wideband directional coupler is proposedby using fragment-type structures. The use of a fragment-type structuremay provide satisfactory flexibility and excellent performance. For agiven design space, a fragment-type wideband coupler can be designed byfirst gridding the space into fragment cells and then metallizing thefragment cells selected by a multi-objective optimization searchingalgorithm, such as a multi-objective evolutionary algorithm based ondecomposition combined with enhanced genetic operators. Fordemonstration, a 20-dB wideband microstrip directional coupler isdesigned and verified by test. A 45% bandwidth centered at 2 GHz hasbeen measured in terms of maximum variation of 0.5 dB in the 20-dBcoupling level. In the operation band, the designed coupler hasdirectivity above 37 dB, and a maximum directivity of 48 dB at 2 GHz. Inaddition, some technique aspects related to multi-objective optimizationsearching, such as effects of design space, control of coupling level,and efficiency consideration for optimization searching, are furtherdiscussed. Fragment-type structures may also be used to designhigh-performance wideband directional couplers of tight coupling level.

  • 64.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Xiaotian, Li
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Andersson, Henrik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Microstrip Antenna Matrix for RFID Positioning over Large Surfaces2015In: Proc. IEEE RFID 2015, 2015Conference paper (Refereed)
  • 65.
    Sidén, Johan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Zeng, Xuezhi
    Jiangsu University.
    Unander, Tomas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Remote Moisture Sensing utilizing Ordinary RFID Tags2007In: Proceedings of IEEE Sensors, New York: IEEE conference proceedings, 2007, p. 308-311Conference paper (Refereed)
    Abstract [en]

    The paper presents a concept where pairs of ordinary RFID tags are exploited for use as remotely read moisture sensors. The pair of tags is incorporated into one label where one of the tags is embedded in a moisture absorbent material and the other is left open. In a humid environment the moisture concentration is higher in the absorbent material than the surrounding environment which causes degradation to the embedded tag’s antenna in terms of dielectric losses and change of input impedance. The level of relative humidity or the amount of water in the absorbent material is determined for a passive RFID system by comparing the difference in RFID reader output power required to power up respectively the open and embedded tag. It is similarly shown how the backscattered signal strength of a semi-active RFID system is proportional to the relative humidity and amount of water in the absorbent material. Typical applications include moisture detection in buildings, especially from leaking water pipe connections hidden beyond walls. Presented solution has a cost comparable to ordinary RFID tags, and the passive system also has infinite life time since no internal power supply is needed. The concept is characterized for two commercial RFID systems, one passive operating at 868 MHz and one semi-active operating at 2.45 GHz.

     

  • 66. Timpe, Daniel
    et al.
    Olsson, Leif
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Cost analysis of introducing a log identification system using RFID in the wood supply chain: A case study at a Swedish forest company2012In: American Journal of Industrial and Business Management, ISSN 2164-5167, Vol. 2, no 4, p. 128-135Article in journal (Refereed)
    Abstract [en]

    A cost analysis for the possibility of a log identification system using Radio Frequency Identification (RFID) is presented in this paper. The introduction provides a brief description of the RFID technology and its usefulness within the area of forest logistics. Information network mapping is used to facilitate an understanding of the current information flow and identification requirements along the supply chain. The cost analysis is performed using the method of break-even analysis using nine different scenarios by means of a case study at the Ortviken paper mill, which is located in central Sweden. The analyses of the processes in the supply chain revealed that the potential exists to streamline operations and to make more efficient use of the available resources by implementing an open loop RFID-based log tracking system in the supply chain using read only tags. Furthermore, this study indicates that even in those cases in which RFID does not provide any major improvements to the firm’s inventory management; it is still possible to achieve economic benefits. However, implementation of such a system will require further development of, in particular, the RFID tags to satisfy the feasibility requirements in the wood supply chain.

  • 67.
    Unander, Tomas
    et al.
    SCA R&D Ctr, SE-85121 Sundsvall, Sweden.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Designing of RFID based Sensor Solution for Packaging Surveillance Applications2011In: IEEE Sensors Journal, ISSN 1530-437X, E-ISSN 1558-1748, Vol. 11, no 11, p. 3009-3018Article in journal (Refereed)
    Abstract [en]

    In this work, a two-chip battery assisted Radio Frequency Identification (RFID) based sensor platform is presented. The radio frequency communication interface is based on the EPC Gen 2 standard. A laboratory setup of the platform has been shown and characterized for a moisture content sensor application. The laboratory setup of the sensor platform has a reading range of 3.4 meters which is in comparison to commercial available Gen 2 tags. The laboratory platform has an average power consumption of 2.1 μW operating at 3 V, which together with a printed battery gives an estimated lifetime for data logging of several years. The proposed RFID platform provides a tradeoff between, communication performance, compatibility with international standards, and flexibility in on-package customization including type and number of sensors. The proposed architecture separates the high-performance communication circuit and the low-frequency sensor interface logic. In the future, the sensor interface maybe integrated using printed logics to further enhance the flexibility and low-ost customization features of the architecture

  • 68. Wang, Gang
    et al.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Jonsson, Peter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Olsson, Torbjörn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    RFID antenna investigation at ITM Department Mid Sweden University2002Report (Other academic)
  • 69.
    Wang, L.
    et al.
    Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027, China.
    Wang, G.
    Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027, China.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Design of fragment-type isolation structures for MIMO antennas2014In: Progress In Electromagnetics Research C, ISSN 1937-8718, E-ISSN 1937-8718, Vol. 52, p. 71-82Article in journal (Refereed)
    Abstract [en]

    Fragment structure should find its application in acquiring high isolation between multiple-input multiple-output (MIMO) antennas. By gridding a design space into fragment cells, a fragment-type isolation structure can be constructed by metalizing some of the fragment cells. For MIMO isolation design, cells to be metalized can be selected by optimization searching scheme with objectives such as isolation, return losses, and even radiation patterns of MIMO antennas. Due to the exibility of fragment-type isolation structure, fragment-type structure has potentials to yield isolation higher than canonical isolation structures. In this paper, multi-objective evolutionary algorithm based on decomposition combined with genetic operators (MOEA/D-GO) is applied to design fragment-type isolation structures for MIMO patch antennas and MIMO PIFAs. It is demonstrated that isolation can be improved to different extents by using fragment-type isolation design. Some technique aspects related to the fragment-type isolation design, such as effects of fragment cell size, design space, density of metal cells, and efficiency consideration, are further discussed.

  • 70.
    Wang, Lu
    et al.
    University of Science and Technology of China, Hefei, China.
    Liu, Ting
    University of Science and Technology of China, Hefei, China.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Wang, Gang
    University of Science and Technology of China, Hefei, China; Key Laboratory of Electromagnetic Space Information, Chinese Academy of Sciences, Hefei, China.
    Design of Chipless RFID Tag by Using Miniaturized Open-Loop Resonators2018In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221, Vol. 66, no 2, p. 618-626, article id 8186235Article in journal (Refereed)
    Abstract [en]

    In this paper, an open-loop resonator with fragment-loading structure is used for the first time in the design of radar cross section-based chipless radio-frequency identification (RFID) tag. By optimizing the distribution of fragment patches in an open loop, a microstrip open-loop resonator can be miniaturized so that the data capacity of the chipless RFID tag designed using such a miniaturized loop resonator can be significantly increased. Moreover, the resonant frequency of the fragment-loaded resonator can be adjusted conveniently by removing or disconnecting some fragment patches, which provides great flexibility for data encoding of the chipless RFID tag. The proposed chipless RFID tag with miniaturized open-loop resonators is designed and tested and can acquire 3.56 bits per resonator and a coding density of approximately 745.1bits/λg 2. Several experimental results validate the proposed design as well as its implementation in a realistic environment.

  • 71.
    Wang, Lu
    et al.
    University of Science and Technology of China, Hefei, China.
    Wang, Gang
    University of Science and Technology of China, Hefei, China.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    High-performance tight coupling microstrip directional coupler with fragment-type compensated structure2017In: IET Microwaves, Antennas & Propagation, ISSN 1751-8725, E-ISSN 1751-8733, Vol. 11, no 7, p. 1057-1063Article in journal (Refereed)
    Abstract [en]

    In this study, a design scheme for high-performance tight coupling microstrip coupler is proposed by adding a fragment-type compensated structure between two loosely coupled lines. Owing to its flexibility and adaptability, the fragment-type compensated structure can not only provide a quarter-wavelength phase shift for coupling enhancement, but also compensate the difference in the phase velocities of the even- and odd-modes for high directivity. Design of the fragment-type compensated structure can be implemented by multi-objective optimisation searching with several design objectives characterising tight coupling couplers. A high-efficiency optimisation searching strategy by using two-dimensional median filtering operator is employed to improve the efficiency of multi-objective optimisation. For demonstration, a high-performance 3-dB tight coupling directional coupler operating at 2 GHz is designed. The measurement data demonstrates a maximum directivity of 47 dB, above 25 dB directivity in a 21.5% bandwidth, a maximum variation of 0.3 dB in the coupling level and a maximum power division ratio of 0.6 dB, which indicate the overall performance better than the previously reported 3-dB couplers. In addition, a simplified theoretical analysis of the proposed coupler and full-wave simulated results are provided for better understanding of the fragment-type compensated structure.

  • 72.
    Yang, Chenwei
    et al.
    University of Science and Technology of China, Hefei, Anhui, China.
    Wang, Gang
    University of Science and Technology of China, Hefei, Anhui, China.
    Song, Xiaotian
    University of Science and Technology of China, Hefei, Anhui, China.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Design of secure UHF RFID tag by binding object dielectric permittivity2017In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 59, no 2, p. 318-323Article in journal (Refereed)
    Abstract [en]

    Antennas can always be affected by the attached materials. Such a property is here integrated with RFID technology of designing a passive RFID tag which is sensitive to a chosen object material. A good sensing ability will help the tag bonding up with the chosen material, which will benefit material security a lot. To achieve a high tag-object bonding sensitivity, a fragmented-type tag is introduced here. When permittivity of attached object material changes a little bit, readability of the tag will degrade rapidly. The sensitive properties are investigated by simulated and articulated experimentations.

  • 73. Zeng, X
    et al.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Wang, G
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Silver Ink Printed Patch Antenna for Passive RFIDManuscript (preprint) (Other academic)
  • 74.
    Zeng, Xuezhi
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Wang, Gang
    Department of Telecommunication Engineering, Jiangsu University, Zhenjiang, China.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Silver Ink Patch Antenna for Passive RFID2007In: Proceedings of ISAP2007, Niigata, Japan, IEEE conference proceedings, 2007, p. 612-615Conference paper (Refereed)
  • 75.
    Zeng, Xuezhi
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Sidén, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Wang, Gang
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Slots in Metallic Label as RFID Tag Antenna2007In: IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), New York: IEEE conference proceedings, 2007, p. 1600-1603Conference paper (Refereed)
12 51 - 75 of 75
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