volume | PIER Journals

Abstract

The current paper describes a compact, long-reading-range tag antenna for radio frequency identification (RFID) applications in the UHF (ultra-high frequency) band, operating at 915 MHz. The antenna's miniaturized design is achieved through the utilization of the meandering line technique. A T-matching structure matches the chip impedance to that of the antenna. Polytetrafluoroethylene, or PTFE, is used as the substrate for fabrication. The UHF tag's physical dimensions are 44.4 × 14.4 × 0.8 mm³. This antenna was first designed, simulated and then optimized by software CST-MWS (Computer Simulation Technology-Microwave Studio) before being fabri-cated. The Measured reflection coefficient at 915.5 MHz is approximately -24 dB, exhibiting a bandwidth of 7,9 MHz (911.5 MHz-919.4 MHz). The proposed tag is shown to have gain of 1.56 dB and radiation efficiency of 90% at the resonant frequency of 915 MHz. Its long-reading-range at 915 MHz is roughly 18.41 m, for an EIRP of 4 W. The measured results closely align with the simulated ones.

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Dr. El Mustapha Louragli

Dr. Younes El Hachimi

Dr. Sudipta Das

Dr. Tanvir Islam

Professor Boddapati Taraka Phani Madhav

Dr. Abdelmajid Farchi