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arXiv · 2504.03412

QuinID: Enabling FDMA-Based Fully Parallel RFID with Frequency-Selective Antenna

Xin Na·Jia Zhang·Jiacheng Zhang·Xiuzhen Guo·Yang Zou·Meng Jin·Yimiao Sun·Yunhao Liu·Yuan He
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Abstract

Parallelizing passive Radio Frequency Identification (RFID) reading is an arguably crucial, yet unsolved challenge in modern IoT applications. Existing approaches remain limited to time-division operations and fail to read multiple tags simultaneously. In this paper, we introduce QuinID, the first frequency-division multiple access (FDMA) RFID system to achieve fully parallel reading. We innovatively exploit the frequency selectivity of the tag antenna rather than a conventional digital FDMA, bypassing the power and circuitry constraint of RFID tags. Specifically, we delicately design the frequency-selective antenna based on surface acoustic wave (SAW) components to achieve extreme narrow-band response, so that QuinID tags (i.e., QuinTags) operate exclusively within their designated frequency bands. By carefully designing the matching network and canceling various interference, a customized QuinReader communicates simultaneously with multiple QuinTags across distinct bands. QuinID maintains high compatibility with commercial RFID systems and presents a tag cost of less than 10 cents. We implement a 5-band QuinID system and evaluate its performance under various settings. The results demonstrate a fivefold increase in read rate, reaching up to 5000 reads per second.

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Xin Na, Jia Zhang, Jiacheng Zhang, Xiuzhen Guo, Yang Zou, Meng Jin, Yimiao Sun, Yunhao Liu, Yuan He. 2025-04-04. QuinID: Enabling FDMA-Based Fully Parallel RFID with Frequency-Selective Antenna. https://doi.org/10.1145/3680207.3723462

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