| 11. |
- Amin, Yasar, et al.
(författare)
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"Green" Wideband Log-Spiral Antenna for RFID Sensing and Wireless Applications
- 2012
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Ingår i: Journal of Electromagnetic Waves and Applications. - UK : Taylor & Francis. - 0920-5071 .- 1569-3937. ; 26:14-15, s. 2043-2050
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Tidskriftsartikel (refereegranskat)abstract
- The novel idea of integrating RFID with sensors along with other wireless applications by using single tag antenna is implemented, by fabricating proposed antenna using state-of-the-art inkjet printing technology on commercially available paper substrates. For the first time, a parametric analysis is performed for realization of planar log-spiral antenna on paper for operational range from 0.8-3.0GHz, which also exhibits excellent coverage throughout numerous RFID ISM bands, and for other wireless applications. The ANSYS HFSS tool is used to design and predict the performance of the proposed antenna in terms of radiation pattern and input impedance.
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| 12. |
- Amin, Yasar, et al.
(författare)
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Green wideband RFID tag antenna for supply chain applications
- 2012
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Ingår i: IEICE Electronics Express. - : Institute of Electronics, Information and Communications Engineers (IEICE). - 1349-2543. ; 9:24, s. 1861-1866
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we demonstrate an RFID tag antenna manufactured by advanced inkjet printing technology on paper substrate using novel hole-matching technique for reducing the consumption of substrate material and conductive ink while attaining green RFID tags. In-depth electromagnetic analysis is performed methodologically for optimizing the parameters that effectuate the antenna dimensions. The antenna design is optimized for consistent wideband performance and extended read range throughout the complete UHF RFID band (860-960MHz), while exhibiting benchmarking results when n across cardboard cartons filled with metal or water containing objects.
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| 13. |
- Amin, Yasar
(författare)
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Printable Green RFID Antennas for Embedded Sensors
- 2013
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In the recent years, radio-frequency identification (RFID) technology has been widely integrated into modern society applications, ranging from barcode successor to retail supply chain, remote monitoring, detection and healthcare, for instance. In general, an RFID tag or transponder is composed of an antenna and an application-specific integrated circuit chip. In a passive UHF RFID system (which is the focus of presented research), the communication between the transponder tag and the reader is established by modulating the radar cross section (RCS) of the transponder tag. The need for flexible RFID tags has recently been increased enormously; particularly the RFID tags for the UHF band ensure the widest use but in the meantime face considerable challenges of cost, reliability and environmental friendliness.The multidimensional focus of the aforementioned research encompasses the production of low-cost and reliable RFID tags. The state-of-the-art fabrication methods and materials for proposed antennas are evaluated in order to surmount the hurdles for realization of flexible green electronics. Moreover, this work addresses the new rising issues interrelated to the field of economic and eco-friendly tags comprising of paper substrate. Paper substrates offer numerous advantages for manufacturing RFID tags, not only is paper extensively available, and inexpensive; it is lightweight, recyclable and can be rolled or folded into 3D configurations.The most important aspect of an RFID system's performance is the reading range. In this research several pivotal challenges for item-level tagging, are resolved by evolving novel structures of progressive meander line, quadrate bowtie and rounded corner bowtie antennas in order to maximize the reading distance with a prior selected microchip under the various constraints (such as limited antenna size, specific antenna impedance, radiation pattern requirements). This approach is rigorously evolved for the realization of innovative RFID tag antenna which has incorporated humidity sensor functionality along with calibration mechanism due to distinctiveness of its structural behavior which will be an optimal choice for future ubiquitous wireless sensor network (WSN) modules.The RFID market has grown in a two-dimensional trend, one side constitutes standalone RFID systems. On the other side, more ultramodern approach is paving its way, in which RFID needs to be integrated with broad operational array of distinct applications for performing different functions including sensors, navigation, broadcasting, and personal communication, to mention a few. Using different antennas to include all communication bands is a straightforward approach, but at the same time, it leads to increase cost, weight, more surface area for installation, and above all electromagnetic compatibility issues. The indicated predicament is solved by realization of proposed single wideband planar spirals and sinuous antennas which covers several bands from 0.8-3.0GHz. These antennas exhibit exceptional performance throughout the operational range of significance, thus paving the way for developing eco-friendly multi-module RF industrial solutions.
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| 14. |
- Amin, Yasar, et al.
(författare)
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Printable RFID antenna with embedded sensor and calibration functions
- 2013
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Ingår i: Progress In Electromagnetics Research Symposium Proceedings, Stockholm, Sweden, Aug. 12-15, 2013. - : Electromagnetics Academy. - 9781934142264 ; , s. 567-570
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Konferensbidrag (refereegranskat)abstract
- An RFID antenna with integrated humidity sensor and calibration functionality for wireless sensor network is proposed. The antenna is composed of series and shunt stubs for impedance matching and reliability for near-field communication. The innovative ladder contour structure plays the key role for humidity sensing, and sensor calibration. The quadrangular end-tip loading is employed to offer capacitance and stability for far-field communication. The prototypes of the antenna are fabricated and tested: antenna effectively senses the ambient humidity levels while demonstrating stable behavior for RFID communication. The antenna has a compact size of 1 × 10cm for 902-928 MHz RFID band.
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| 15. |
- Amin, Yasar, et al.
(författare)
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RFID antenna humidity sensor co-design for USN applications
- 2013
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Ingår i: IEICE Electronics Express. - : Institute of Electronics, Information and Communications Engineers (IEICE). - 1349-2543. ; 10:4, s. 20130003-
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Tidskriftsartikel (refereegranskat)abstract
- We demonstrate for the first time an RFID tag antenna which itself is humidity sensor and also provides calibration functionality. The antenna is comprised of T-matching network and horizontally meandered lines for impedance matching and reliable near-field communication. The novel contour design provides humidity sensing, and calibration functions whilst concurrently acts as a radiating element along with quadrangular capacitive tip-loading with covered middle portion for far-field communication. The inkjet printed prototypes of the antenna provide effective ambient humidity sensing while demonstrating stable RFID communication. The antenna has a compact size of 1.1 x 10.2 cm for 902-928MHz band.
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| 16. |
- Amin, Yasar, et al.
(författare)
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Two-arm Sinuous Antenna for RFID Ubiquitous Sensors and Wireless Applications
- 2012
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Ingår i: Journal Electromagnetic Waves and Applications. - UK : Taylor & Francis. - 0920-5071 .- 1569-3937. ; 26:17-18, s. 2365-2371
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Tidskriftsartikel (refereegranskat)abstract
- For the first time, two-arm planar sinuous antenna is demonstrated to realize the emerging concept of integrating RFID functionalities along with sensors and other wireless applications for "green" electronics. In-depth, parametric analysis is performed for the proposed antenna which is fabricated on a paper substrate using revolutionary inkjet printing technology to develop a system-level solution for ultra-low-cost mass production of multipurpose wireless tags in an approach that could be easily expanded to other microwave and wireless "cognition" applications. The proposed antenna exhibits excellent performance throughout several RFID ISM bands and for other wireless applications in its operational range from 0.8 to 3.0 GHz.
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| 17. |
- Ansari, Muhammad Adeel, et al.
(författare)
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Diode based charge pump design using 0.35μm technology
- 2010
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Ingår i: 28th Norchip Conference, NORCHIP 2010. - : IEEE. - 9781424489732 ; , s. 5669437-
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Konferensbidrag (refereegranskat)abstract
- A high voltage charge pump design is being presented in this paper. The design is based on Dickson charge pump, constructed with diodes by using AMS 0.35μm technology. The innovation is made in Dickson charge pump i.e. charge control PMOS transistor is used in each stage of charge pump. PMOS transistor is used in series with charging capacitor which reduces the power consumption during the clock transition by controlling the time constant of each stage. The resistance between drain to source of PMOS transistor increases the time constant during the charging of the capacitor placed in each stage of charge pump. The output voltage of about 5.693V is achieved by the six stages of Dickson charge pump at no-load which reduces to 5.537V with the six stages of proposed charge pump but the power during the input clock transition is reduced from 340.5μw (consumed by Dickson charge pump) to 28.85 μW (consumed by the proposed modified charge pump). Some other results are also discussed in this paper, which are achieved on different load resistances.
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| 18. |
- Chen, Jian, et al.
(författare)
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The Design of All-Digital Polar Transmitter based on ADPLL and Phase Synchronized Delta Sigma Modulator
- 2012
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Ingår i: IEEE Journal of Solid-State Circuits. - : IEEE Solid-State Circuits Society. - 0018-9200 .- 1558-173X. ; 47:5, s. 1154-1164
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Tidskriftsartikel (refereegranskat)abstract
- An improved architecture of polar transmitter (TX) is presented. The proposed architectureis digitally-intensive and mainly composed of an all-digital PLL (ADPLL) for phasemodulation, a 1-bit low-pass delta sigma (Delta Sigma) modulator for envelop modulation, and aH-bridge class-D power amplifier (PA) for differential signaling. The (Delta Sigma) modulator isclocked using the phase modulated RF carrier to ensure phase synchronization between theamplitude and phase path, and to guarantee the PA is switching at zero crossings of theoutput current.An on chip pre-filter is used to reduce the parasitic capacitance from packages at theswitch stage output. The high over sampling ratio of the (Delta Sigma) modulator move quantizationnoise far away from the carrier frequency, ensuring good in-band performance and relax filterrequirements. The on-chip filter also acts as impedance matching and differential to singleended conversion. The measured digital transmitter consumes 58 mW from a 1 V at 6.8 dBm output power.
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| 19. |
- Hu, R., et al.
(författare)
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Biofeedback neuromuscular electrical stimulation front-end for dysphagia treatment
- 2014
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Ingår i: IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings. - : IEEE Press. - 9781479923465 ; , s. 612-615
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Konferensbidrag (refereegranskat)abstract
- A dedicated front-end for biofeedback neuromuscular electrical stimulation (NESM) system is proposed. For controllable dysphagia treatment, the integrated circuit (IC) provides a stimulator front-end with programmable stimulation parameters (2μA-1mA current amplitude, DC-2KHz frequency, and variable duty cycle) and an electromyogram/impedance (EMG/ETI) readout front-end with programmable gain and bandwidth (42-80dB, 0.1Hz-1.2KHz) for biofeedback. Area-efficient, low-power but high precision current controlling is achieved by inducing the sigma-delta modulator technique in the stimulation channel. The measured impedance and EMG signal are used to determine the stimulation parameters, enabling a closed loop optimized treatment. The proposed front-end is fabricated in a 0.18 μm standard CMOS process technology and dissipates a peak power of 2.3 mW at the supply voltage of 1.8 V. Measurement results on a live person are also provided to validate the system's effectiveness.
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| 20. |
- Kanth, R. K., et al.
(författare)
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Comparative End-of-Life Study of Polymer and Paper Based Radio Frequency Devices
- 2012
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Ingår i: International Journal of Environmental Protection. - 2224-7777. ; 2, s. 23-27
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Tidskriftsartikel (refereegranskat)abstract
- In this work end-of-life (EOL) analysis of polymer and paper based radio frequency devices have been carried out. Polymer and paper based RFID antenna has been chosen as a radio frequency device. An attempt has been made to investigate and evaluate the environmental emissions at end-of-life-cycle stage and to explore type and quantity of emissions at their disposal. The Gabi’s balance calculation methodology has been employed to determine amount of environmental emissions at the end-of-life cycle stage. Each significant component of the antenna and their corresponding emissions has been investigated in this paper. We have also compared the corresponding emissions to air and fresh water in both the technologies i.e. incineration and land-filling at EOL stage.
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