Article
Computer Science, Information Systems
Redouane Jouali, Mohssin Aoutoul, Hassan Ouahmane, Sarosh Ahmad, Anas Had, Fadwa El Moukhtafi, Naser Ojaroudi Parchin, Chan Hwang See, Raed Abd-Alhameed
Summary: This paper presents a new analog design for a long-read range RFID tag antenna aimed at localization applications. The design focuses on characterizing the antenna impedance through the study of capacitive effects created by gaps and the introduction of open circuited L-shaped stubs. The results show that the proposed antenna design significantly improves performance through the introduction of gaps and stub structures with optimized dimensions. The proposed antenna operates in two frequency bands and is mainly composed of three split rectangular resonators.
Article
Multidisciplinary Sciences
Abubakar Sharif, Rajesh Kumar, Kamran Arshad, Khaled Assaleh, Hassan Tariq Chattha, Muhammad Ali Imran, Qammer Hussain Abbasi
Summary: This paper proposes a nature-inspired spider web-shaped UHF RFID reader antenna and battery-free sensor system for healthcare applications. The antenna design consists of concentric decagons and microstrip lines, providing strong and uniform field characteristics, wideband coverage, and low gain. It effectively resolves orientation sensitivity issues and can read tagged medicine pills, jewelry, intervenes solution, and blood bags in various orientations. The proposed antenna-based system is a strong contender for near-field RFID, healthcare, and IoT applications.
SCIENTIFIC REPORTS
(2023)
Article
Computer Science, Information Systems
Ismail Akdag, Cem Gocen, Merih Palandoken, Adnan Kaya
Summary: In this article, a novel UHF RFID reader antenna is proposed and experimentally investigated. The antenna design consists of three layers, achieving excellent RF performance and demonstrating its technical potential in RFID-based wireless networks.
Article
Engineering, Electrical & Electronic
Yuan Yao, Yani Xue, Xiaojuan Ren, Junsheng Yu, Xiaohe Cheng, Xiaodong Chen
Summary: This paper proposes a three-dimensional uniform ultra-high frequency near-field radio frequency identification reader antenna, which achieves a uniform electric field and direction consistency through a specific design. The antenna meets the requirements of near-field RFID in terms of frequency range and isolation degree.
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Danhua Li, Wenquan Cao, Luang Wang, Yixin Tong
Summary: This letter proposes an ultra-low profile and high-performance UHF RFID reader antenna that can switch between far-field and near-field operative modes. The antenna is composed of four dipoles and a reconfigurable feed network, providing a NF reading area of 180 x 180 mm(2) and a FF gain of 4.7 dBic. This antenna's excellent performance is advantageous for its application in RFID systems.
ELECTRONICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Rajesh Kumar Singh, Andrea Michel, Paolo Nepa, Alfredo Salvatore, Maria Terraroli, Paolo Perego
Summary: A novel combination of loop and dipole antennas into a Yagi-like structure is investigated for implementing a wearable antenna. Compact Yagi-like textile structures are designed and compared, with parasitic elements acting as reflectors or directors to limit radiation towards undesired directions. Performance of these structures is measured in terms of reflection coefficient and near-field distribution, with read range performance measured using RFID reader and tags.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Computer Science, Information Systems
Yuan Yao, Qiuyue Ge, Junsheng Yu, Xiaodong Chen
Summary: This study proposed a novel antenna for UHF RFID near-field applications with uniform distribution of electric field along x and y axes. The antenna used a spiral structure for broadband and multi-polarization, achieving good impedance matching within 860-960 MHz. The study also demonstrated the scalability of array design and the ability to control the reading area.
Article
Engineering, Electrical & Electronic
Zhengyong Yu, Cheng Huang, Yihan Xu, Yan Jiang
Summary: This paper presents a broadband cross dipole antenna for UHF RFID applications, which has strong identification performance and wide operating bandwidth. Designed with two perpendicular coplanar dipoles, the antenna achieves broadband characteristics by adjusting the length of one dipole.
IEICE ELECTRONICS EXPRESS
(2021)
Article
Engineering, Electrical & Electronic
Kawther Mekki, Omrane Necibi, Saoussen Lakhdhar, Ali Gharsallah
Summary: This paper introduces a new circular monopole antenna with triple-band characteristics for use in both UHF and UWB, which can be integrated into an RFID system reader board. The antenna, designed with a patch and a CPW feed microstrip line, meets the UHF/UWB bandwidth requirements for RFID applications. Simulation and measurement results show that the antenna has a maximum gain of 4.8 dBi and a radiation pattern that covers the full working band. Experiments demonstrate that the UHF-RFID performance of the monopole antenna is comparable to existing commercial solutions.
JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Chenyang Song, Zhipeng Wu
Summary: This letter presents a loop antenna array for ultrahigh frequency near-field and far-field RFID reader applications. The antenna array is composed of microstrip collinear loop antennas that generate a uniform magnetic field and omnidirectional radiation. By configuring the array antenna, the near-field reading area is enlarged and the far-field coverage is increased.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Hyunki Jung, Kyung-Sik Choi, Keun-Mok Kim, Daehoon Jo, Jaeheon Lee, Jusung Kim, Jinho Ko, Sang-Gug Lee
Summary: This brief introduces a CMOS fractional-N frequency synthesizer designed for UHF RFID reader applications. The synthesizer is designed with a narrow loop bandwidth and a 2nd-order loop filter, paired with a low noise VCO, to meet the stringent phase noise specifications of UHF RFID transceivers. A transformer-based impulse sensitivity function (ISF) manipulating VCO is proposed to support the target PN of the frequency synthesizer, with large pass-band characteristics. Compared to conventional ISF manipulating VCOs, the proposed solution improves PN and has superior figure of merit (FOM). The frequency synthesizer is implemented in a 55nm CMOS technology as part of the UHF RFID transmitter, satisfying the PN requirements of EPC global standard and various local regulations across the UHF RFID operating frequency range.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Chemistry, Analytical
Franck Kimetya Byondi, Youchung Chung
Summary: This study presents the design of a 920 MHz UHF RFID conductive fabric tag antenna, measuring the DC resistance and impedance of the fabric to calculate conductivity, and simulating different tag designs to compare results. The fabric tag antennas showed different reading ranges and characteristics, suitable for entrance control systems due to their easy application on other fabrics and clothes.
Article
Chemistry, Analytical
Franck Kimetya Byondi, Youchung Chung
Summary: This paper presents a long-range convex cavity-type passive UHF RFID tag for energy harvesting in IoT sensors, suitable for use on both metal and non-metal surfaces. The tag antenna provides a linear polarized frontal reading range of 35 m and side reading range above 15 m, operating at both 920 MHz and 915 MHz UHF RFID frequencies. The antenna characteristics, structure, modeling, simulation, and experimental results are discussed, with a comparison between mathematical reading range and experimental data.
Article
Engineering, Electrical & Electronic
Silong Wang, Yulong Liu, Terry Tao Ye
Summary: By using the geometries of 26 English letters as examples, the study explores a general methodology for shape-specific antenna design. Results show that these letter shapes can be categorized into 9 groups, and each group of antennas can be designed using standard baseline geometries. Experiments demonstrate that each letter-shaped antenna can achieve satisfactory performance, with the longest reading range exceeding 20 meters.
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Sudhir Bhaskar, Mohammad Gulman Siddiqui, Sarthak Singhal, Aarti Bansal
Summary: In this study, a circularly polarized antenna employing fractal slot geometry is proposed for UHF-RFID handset reader application. The antenna achieves circular polarization by using a Vicsekcross-shaped slot etched at diagonal axis and a coaxial feed placed at 45 degrees. By evolving the Vicsekcross-shaped fractal slot in different iteration stages, wide impedance bandwidth and good axial ratio bandwidth performance for the U.S. UHF-RFID band are achieved. The designed antenna has an impedance bandwidth of 25 MHz (903-927 MHz) and an axial ratio bandwidth of 7 MHz (911-917 MHz). Additionally, the antenna exhibits left-hand circular polarization (LHCP) with a maximum measured gain of 2.9 dBic. The final Vicsekcross-shaped four slot CP reader antenna is compact in size, measuring 57 x 57 x 1.6 mm³.
IEEE JOURNAL OF RADIO FREQUENCY IDENTIFICATION
(2022)
