A UHF RFID Tag Antenna Sensor Using Stepped Impedance Defected Microstrip Structure and Its Application to Metallic Auxiliary Axle Counter of Train Detection

Kuan, Wai-Son; Chio, Chi-Hou; Tam, Kam‐Weng; Lin, Huawei; Oliveira, Paulo Olavo Lima Neves; Delgado, Lwena Susana Benros

doi:10.1109/rfid-ta54958.2022.9924115

2022 IEEE 12th International Conference on RFID Technology and Applications (RFID-TA) 2022

DOI: 10.1109/rfid-ta54958.2022.9924115

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A UHF RFID Tag Antenna Sensor Using Stepped Impedance Defected Microstrip Structure and Its Application to Metallic Auxiliary Axle Counter of Train Detection

Wai-Son Kuan

Chi-Hou Chio

Kam‐Weng Tam

et al.

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2024

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“…For emerging WiFi 5 and 6 deployment, the study of characteristics of 5 GHz for these tags is still rare according to the authors' literature review. To this end, based on our previous work of UHF RFID tags for metallic objects [21,22], this letter proposes a cross-shaped structure (CSS)-based parallel coupled line (PCL) transformer and its tuning possibility. Three-dimensional printing technology is used in the design in order to provide economic solution of public facilities tagging in practice.…”

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An impedance transformer for UHF RFID and WiFi cross‐technology communication‐based tourism crowd counting

Tai,

Tam,

Kuan

2024

Electronics Letters

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This letter proposes a novel cross‐shaped structure‐based parallel coupled line transformer and its application to tag antenna for 920‐MHz radio frequency identification (RFID) and 5‐GHz WiFi Cross‐Technology Communication (CTC). This transformer can be tuned by some lumped capacitors and the equivalent transmission line length for high order harmonic matching. The WiFi is applicable for tourism crowd counting and its counting accuracy may be increased with an additional number of the virtual WiFi Access Points contributed by 5‐GHz resonance of said tags attached with touristic metallic objects. To study the 5‐GHz resonance of these tags the tag antenna is a square patch with a rectangular slot built with 3D acrylonitrile butadiene styrene printing material. The working frequency of the antenna is around 920 MHz, which can achieve a gain of 5.4 dBi and there is also a resonance at 5.6 GHz with a gain of −6.7 dBi. When the capacitor is tuned, the 5‐GHz band of WiFi is varied from 5.2 to 5.6 GHz applicable to emerging WiFi 5 and 6 CTC applications. It is anticipated that the prototype tag provides a flexible tourism crowd counting solution using CTC in the future.

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An impedance transformer for UHF RFID and WiFi cross‐technology communication‐based tourism crowd counting

Tai,

Tam,

Kuan

2024

Electronics Letters

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Wireless Train Detection Based on Null-Filled UHF RFID Reader Antenna for Communications-Based Train Control

Pang,

Tam,

Huang

et al. 2024

IEEE Trans. Veh. Technol.

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A UHF RFID Tag Antenna Sensor Using Stepped Impedance Defected Microstrip Structure and Its Application to Metallic Auxiliary Axle Counter of Train Detection

Cited by 2 publications

References 0 publications

An impedance transformer for UHF RFID and WiFi cross‐technology communication‐based tourism crowd counting

An impedance transformer for UHF RFID and WiFi cross‐technology communication‐based tourism crowd counting

Wireless Train Detection Based on Null-Filled UHF RFID Reader Antenna for Communications-Based Train Control

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