- 标题
- 摘要
- 关键词
- 实验方案
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A dual-band circularly polarized microstrip patch antenna with a cross shaped slot for 0.92/2.45 GHz RFID applications
摘要： A double-band circularly polarized (CP) patch antenna is presented. It is a round patch antenna with a cross-shape slot. Furthermore, it radiates wide beam CP waves at two radio-frequency identification (RFID) bands: 920 MHz and 2.45 GHz. Slightly oblate round patch antennas generally radiate CP waves and have resonant frequencies at two or more harmonic bands. To radiate wide beam CP waves at two bands, a cross-shape slot was made on a round patch antenna in this study. As a result, the cross-shape slot has made it possible for a 920 MHz round patch antenna to simultaneously radiate wide beam CP waves at 2.45 GHz which is higher than a harmonic frequency.
关键词： circularly polarized,RFID,cross shaped slot,double-band,patch antenna
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE ANDESCON - Santiago de Cali (2018.8.22-2018.8.24)] 2018 IEEE ANDESCON - Obstacle Detection System to Improve Mobility of People with Visual Impairment
摘要： Visual information is one of the most important factors in the perception of the environment. People with Visual Impairment (VI) have many limitations to explore unfamiliar environments since they lack of vision. Previous works, carried out by other researchers, focus on helping people suffering from VI by using different technologies to improve environment percept, however, none of them analyzes the possibility of avoiding frontal obstacles at face height. That is why in this article we propose a system for detecting obstacles in the superior frontal plane to improve the mobility of people with VI. The proposed system is based on ultrasound sensors and an Android application to process and communicate useful information. The system is low cost, wireless, ergonomic and user friendly. The results indicate that the system is capable of detecting (on average) 80% of frontal obstacles at face height. The implementation of the proposed system can improve the quality of life of people suffering from VI, providing independence in mobility in unfamiliar environments.
关键词： Ad-Hoc,WiFi,sensor de ultrasonido,Discapacidad visual,ciegos,RFID,Invidentes
更新于2025-09-23 15:23:52
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Circular economy in RFID technology: analysis of recycling methods of RFID tags
摘要： Circular Economy (CE) is one of the approaches which are intensively developed and tested in different areas of industry and services. The aim of this solution is to use many kinds of resources in a closed flow and to achieve as a small amount of waste as it is possible. One of the potential areas of using CE is Radio Frequency Identification (RFID). In RFID systems tags are utilized in various forms. This paper addresses investigation of a recycling process of RFID tags. Different attachment methods of these tags were tested and then, a recycling procedure was prepared based on the obtained results in which adhesives are recommended to be used as an attaching material between a tag and an identified object. The mentioned procedure was evaluated with using paper-face RFID tags. It was confirmed applicability of the proposed solution. Moreover, the conducted research revealed that an adhesion force of the adhesive layers in the prepared RFID tags decreased in the most extent during the first recycling cycle. It was found that in order to preserve a high adhesion force of these layers it is suggested to place the tags on a clean surface.
关键词： Zero waste economy,mechanical force measurements,radio frequency identification,multiuse RFID tags,recycling cycle
更新于2025-09-23 15:23:52
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[IEEE 2018 International Flexible Electronics Technology Conference (IFETC) - Ottawa, ON, Canada (2018.8.7-2018.8.9)] 2018 International Flexible Electronics Technology Conference (IFETC) - Circularly Polarized Microstrip Antenna on Ultrathin PET Substrate for UHF RFID Applications
摘要： Design of a circularly polarized microstrip patch antenna on an ultrathin PET substrate of 125 μm thickness is proposed for RFID applications. Screen-printed silver coating of 25 μm thickness serves as the antenna metallization. Improved feed-design and systematic optimization of the antenna overcomes the intrinsic constrains of designing microstrip antennas on extremely thin substrate. Optimally designed feed excites a nearly square patch antenna with truncated corners to achieve good impedance and radiation characteristics. The proposed antenna exhibiting 48 MHz impedance bandwidth (896 MHz to 944 MHz) and a 16 MHz AR bandwidth (907-923 MHz), can serve as a potential candidate as a low cost UHF reader antenna for RFID applications.
关键词： Microstrip Antenna,radio-frequency identification (RFID),Circular Polarization (CP),Quarter Wave Transformer,Axial Ratio (AR)
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE 3rd International Conference on Computing, Communication and Security (ICCCS) - Kathmandu, Nepal (2018.10.25-2018.10.27)] 2018 IEEE 3rd International Conference on Computing, Communication and Security (ICCCS) - Li-Fi Technology: Bridging The Radio Frequency Communication Gap
摘要： Communication in the modern day era is predominantly dependent on Information and Communication Technology (ICT). The rise in cybercrime, digital espionage and other cyber-related disturbances is one of great concerns to cyberspace users, both corporate and individual. Radio Frequency technologies and solutions been adopted for in-building, and outdoor wireless coverage solutions for the supply-chains market, including turnkey solutions for optimized communications, are been faced with security issues. This paper suggests a secure network communications route (Li-Fi Technology) alternative for users of radio frequency identification (RFID) technologies and solutions. A communication path that is resilient and resistant to disruptions by mitigating sophisticated network communication attacks such as spoofing and TCP/IP attacks (Man-In-the-middle attacks, Denial of Service attacks). This paper proposes the use of Li-Fi network for a safe and secure cyberspace communication exchange path.
关键词： LED,Wi-Fi,Li-Fi,RFID,Network,Attacks,Communication
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Macau, Macao (2018.9.26-2018.9.28)] 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - A Multi-Antenna SAR-based method for UHF RFID Tag Localization via UGV
摘要： This paper presents a multi-antenna approach of the phase-based SARFID method to locate static tags by employing two UHF-RFID reader antennas installed on an Unmanned Grounded Vehicle (UGV). The UGV is remote-controlled and equipped with Laser Range Finder sensors to move inside an indoor environment, and the knowledge of its trajectory is achieved through a Simultaneous Localization And Mapping procedure. By processing the phase data collected from each reader antenna, different matching functions can be obtained and combined to improve the estimation of the bi-dimensional tag position. Differently from other localization techniques, neither reference tags (anchor tags), nor large phased array antennas are required.
关键词： Multiple RFID Antennas,UGV,UHF-RFID localization,SLAM,Robot,RFID retail applications,RFID UGV,Passive UHF-RFID system,SARFID
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Macau, Macao (2018.9.26-2018.9.28)] 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Alternatives to current RFID chip set market offerings
摘要： There are a large number of RFID chip sets on the market. These chip sets cover the most widely deployed RFID technologies. These chip sets enable the rapid development of RFID readers as well as the inclusion of RFID into other devices. These market offerings frequently require an ancillary microprocessor to undertake the anti-collision algorithm in conjunction with the RFID chip set. These chip sets largely act simply to provide an RF front end with some encoding, decoding, protocol framing and CRC checking to support the overall activity. This paper presents the current state of the RFID chip set market and argues that these offerings fall short of what is required from a genuine RFID solution-on-chip (SoC). Alternatives, including a genuine RFID SoC and dedicated RFID ASIC implementing anti-collision algorithms are proposed.
关键词： FPGA,Anti-collision,ASIC,VHDL,RFID
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Macau, Macao (2018.9.26-2018.9.28)] 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Auditing of Ultra Dense RFID Straws in Cryogenic Container at -196°C
摘要： This paper presents a new auditing system scheme for cryopreservation based on radio frequency identification (RFID) at temperature of -196 oC. Conventional approaches such as hand written labels or printed barcodes suffer from the significant manual labor work and freeze-thaw-damaging risk of the sample. The proposed scheme integrates miniaturized RFID electronic devices and antennas in the thin cryogenic straws without significantly changing their dimensions. In addition, 900 MHz frequency band is chosen for long reading range, which eliminates the need to take the preserved biological samples out of liquid nitrogen and minimizes the damaging risk. Four most important technical aspects for the system have been identified and investigated: 1. The link budget is evaluated by FDTD numerical simulations to make sure the RF signal strength meets the requirement for the reading range. 2. The total efficiency of small and tightly coupled RFID dipole antennas is studied and obtained by simulations. 3. The current-voltage behaviors of two types of transistors in typical RFID electronics have been characterized by measurements to identify the suitable transistor type for reliable circuit designs at -196 oC. 4. The easy-to-access and anti-collision reading system for fast data collection is analyzed. The obtained results indicate that the proposed scheme is feasible, which can be beneficial for the relevant scientific fields.
关键词： coupling,FET,cryopreservation,RFID,antennas
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Macau, Macao (2018.9.26-2018.9.28)] 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Polarization Reconfigurable Antenna with Beam Steering Performance
摘要： This paper proposed a novel method reconfiguring the polarization of the dielectric resonator antenna (DRA) with beam steering performance. During the process of liquid alteration between the two zones of the 3-D printed container, the proposed antenna performed with beam steering performance. What's more, the polarization was switched with the beam steering process. The proposed design is suitable for the application as a RFID reader.
关键词： dielectric resonator antenna,Radio frequency identification (RFID),polarization reconfigurable,beam steering
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Macau (2018.9.26-2018.9.28)] 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Secondary Near Field RFID Antennas for Wireless Structural Health Monitoring Systems
摘要： In this paper it is shown that a conductive feed used to excite a standing surface wave on a metallic object can be used to reliably power a passive UHF RFID sensor tag mounted to the same. The read rates of this method and that of free space are compared. Findings show that along the metallic bar structure, and for a greater distance, minimum read rates were at least 9 times greater than in free space. The maximum read rates were found to be around 20 times larger than in free space. It is shown that by utilizing the metallic structure itself, as a secondary nearfield antenna, it is possible to read accelerometer sensor data effectively from a passive UHF sensor tag such as the WISP 5.0. Such a technique may provide a low cost alternative to traditional SHM systems.
关键词： structural health monitoring,acceleration,UHF RFID,metal,sensing,WISP
更新于2025-09-23 15:22:29