ACES Publication Search
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| Title: | ACES March 2010 Full Journal |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 20829 KB |
| Title: | ACES March 2010 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 352 KB |
| Title: | Logo-Antenna Based RFID Tags for Advertising Application |
| Abstract: | In this paper we provide the basis of using radio frequency identification (RFID) tags for advertisement. Two RFID tags that apply to the 866 MHz and 915 MHz operating frequencies, respectively, were designed based on the logos of two universities participating in this project. Several fabrication methods were used to build the RFID tags on different substrates. The experimental results exhibited favorable read ranges and radiation patterns. This work demonstrates the applicapability and design flexibility of RFID tags for many advertising applications. |
| Author(s): | K. ElMahgoub, T. Elsherbeni, F. Yang, A. Z. Elsherbeni, L. Sydänheimo, L. Ukkonen |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 1478 KB |
| Title: | Bidirectional Radiated Circularly Polarized Annular-Ring Slot Antenna for Portable RFID Reader |
| Abstract: | A novel single-layer, microstrip-toslotline transition technique for coupling a circularly polarized annular-ring slot antenna in the UHF band is presented. In the proposed design, circular polarization is generated using a proper asymmetry within the annular-ring slot structure and feeding the annular-ring slot using a slotline feed at 135° from the asymmetry. The direct slotline feed is used which is coupled to a 50-? microstrip line on the opposite side of the substrate. The asymmetry in the proposed design is a meandered-slot section and the proposed CP design is achieved by the two orthogonal linear modes of the annular-ring slot. Simulated and measured results indicate that the proposed structure can achieve good CP radiation performances, and an impedance bandwidth and a 3-dB axial-ratio bandwidth obtained for the design are about 17.6% and 3.72%, respectively. |
| Author(s): | Y. Lin, Y. Kao, S. Pan, H. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 1389 KB |
| Title: | Low-profile Normal-Mode Helical Antenna for Use in Proximity to Metal |
| Abstract: | To expand the applicability of UHF tags, a low-profile, small, normal-mode helical antenna (NMHA) that can be used on metallic plates was developed. This paper clarifies the design method for antenna structures for use in proximity to metal. The design data were obtained with the electromagnetic simulator FEKO. Fundamental electrical characteristics such as the antenna input impedances, self-resonance conditions, and radiation characteristics were clarified in proximity to metal. For antenna sizes of 0.03–0.05 wavelengths, antenna gains of about –0.5 dBd were achieved. The calculated results were verified using an actual antenna (size, 0.04 wavelengths). A tap feed structure was used for impedance matching. It was shown that very precise design results could be achieved. Moreover, the developed NMHA was designed to be a tag antenna. Here, the antenna impedance was matched to the IC chip impedance. The read range of the developed tag was measured to be about 15 m. |
| Author(s): | W. Hong, N. Michishita, Y. Yamada |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 3524 KB |
| Title: | New Antennas Based on Triangular Patch as a Solution for RFID Application |
| Abstract: | This paper covers the design of a new antenna for RFID applications at microwave frequencies. Five antennas are studied. The first three structures are inspired from a triangular patch, whereas the fourth and the fifth are inspired from a Sierpenski fractal antenna. The size reduction is more than 80%, which explains the utility of the proposed antennas. |
| Author(s): | A. Ferchichi, N. Sboui, A. Gharsallah, H. Baudrand |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 477 KB |
| Title: | The Effect of Curvature on the Performance and Readability of Passive UHF RFID Tags |
| Abstract: | In this paper, the effect of curvature on the passive UHF RFID tag is studied. Maxwell’s equations are used to depict the typical curved passive tag and are used to study the theoretical limitations of a tag operating under curvatures at its normal axes. This theoretical framework is then used to analyze the typical tag for various curvatures. Here, the analysis is conducted to derive the effect of curvature on the optimal impedances for ASIC load matching, as well as gain. This analytical evaluation is also generalized to describe the shift in center frequency of the tag operation due to tag curvatures. The results derived from this theoretical study on commercially available passive UHF RFID tags are verified with experimental results. It is shown that the curvature of passive UHF RFID tags have a significant impact on the performance and readability at values of ?? > ?????, and reaches a breakdown on conformity at curvature values of ?? = 4?????. |
| Author(s): | D. D. Arumugam, D. W. Engels, M. H. Mickle |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 2769 KB |
| Title: | Advanced Carbon-Fiber Composite Materials for RFID Tag Antenna Applications |
| Abstract: | In this paper we explore the use of carbon fiber composites (CFC) in radio-frequency identification (RFID) antenna applications both numerically and experimentally. For this purpose, we use two kinds of CFC materials as the radiating element. We consider two types of RFID antennas: the T-match bowtie antenna, and the meander line antenna. The electromagnetic (EM) model of CFC antennas is developed using the Microwave Studio software for numerical analysis. By characterizing samples of CFC material an accurate model of the composite is obtained to be used in the antenna simulation. The composite RFID antenna performance is investigated and compared with a metal antenna. The performance of the antenna can be controlled using the anisotropic property of reinforced continuous carbon fiber composite material. The bandwidth, radiation resistance, and gain/read-range of the RFID antenna can be adjusted by changing the thickness, conductivity, and fiber orientation of the composite material. Because the CFC antenna has a much higher bandwidth, it can be more effective than a metal antenna in RFID. |
| Author(s): | A. Mehdipour, I. D. Rosca, A. Sebak, C. W. Trueman, S. V. Hoa |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 1464 KB |
| Title: | Green Technologies and RFID: Present and Future |
| Abstract: | RFID systems are proliferating in everyday applications. In this paper, the authors present a unified approach that relies on the development of novel low-cost inkjet-printed platforms with optimized metallization trace and effective integration of diodes for enhanced discrimination capability applications. Potentially, the presented approach could set the foundation for the first generation of truly “green” RFIDbased devices. |
| Author(s): | G. Orecchini, L. Yang, A. Rida, F. Alimenti, M. M. Tentzeris, L. Roselli |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 1987 KB |
| Title: | Collision Resolution in ISO 18000-6c Passive RFID |
| Abstract: | According to the ISO 18000-6c passive RFID standard (EPCglobal Gen 2), in a tag intensive environment, when multiple tags receive the reader Query command and respond simultaneously, the reader may receive multiple responses giving what is termed a collision or a collision signal. This paper reports a method for resolving the two tag collision condition in real time thus not requiring any additional input by the reader. A reader has been designed using a National Instruments set of equipment which includes an FPGA-based software defined reader. The collision signal is obtained from the data acquisition system and processed by the FPGA in real time. This is a straightforward algorithm that can be implemented in silicon or programmed in a microprocessor to replace the current FPGA. |
| Author(s): | Y. Sun, P. J. Hawrylak, Z. Mao, M. H. Mickle |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 6393 KB |
| Title: | RFID-Network Planning by Particle Swarm Optimization |
| Abstract: | The design of an ad-hoc network of readers for RFID services in large areas may require the deployment of a significant number of interrogating antennas due to the limited range of reader-tag communication. For passive tags, the factors affecting the performance of the whole link depend on many physical and geometrical parameters. The reading region is not only related to the emitted power and the radiation patterns of reader/tag antennas, but also to the propagation environment. When a number of readers are planned in a network, mutual coverage of read-zones and mutual interference are generally undesired while safety regulation constraints have to be fulfilled in the whole area. This paper introduces simple models of the most relevant electromagnetic aspects involved in the network planning problem and considers an efficient solution based on the Particle Swarm Optimization algorithm. Numerical and experimental results show the effectiveness of the method. |
| Author(s): | E. Di Giampaolo, F. Forni, G. Marrocco |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 726 KB |
| Title: | RFID-Based System for Pilgrims Identification and Tracking |
| Abstract: | This paper describes a prototype of a system developed using a passive RFID wristband tag for identification of pilgrims in the holy areas during Hajj. Upon presentation of the tag to a handheld reader all information related to the pilgrim holding the tag will be displayed on the screen of the reader. This way if a pilgrim gets sick, lost, or dies he can be easily identified through the tag on the spot. Officers around the holy area will have a light-weight handheld reader that can get all information from the tag without the need to burden the already overloaded communication network during the Hajj season. The developed prototype was tested on 1000 pilgrims from the country of Ivory Coast in collaboration with officials from Hajj Ministry and Development Commission of the Holy cities of Makkah and Madinah. The results of the experiment have convinced Hajj authorities to utilize this technology for all pilgrims in the future. Additionally, we have explored the possibility of tracking pilgrims using active RFID system. Due to the small number of working tags, experiment was performed only on 6 persons. Results of the latter experiment have shown that the system requires further development and needs to be validated with a larger number of tags. |
| Author(s): | M. Mohandes |
| File Type: | Journal Paper |
| Issue: | Volume: 25 Number: 3 Year: 2010 |
| Download Link: | Click here to download PDF File Size: 900 KB |