ZHANG, Dongchi; MA, Jiteng; HEMOUR, Simon; GU, Xiaoqiang

doi:10.1109/wptce62521.2025.11062150

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ZHANG, Dongchi

MA, Jiteng

HEMOUR, Simon

Laboratoire de l'intégration, du matériau au système [IMS]

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Communication dans un congrès

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2025 IEEE Wireless Power Technology Conference and Expo (WPTCE), 2025 IEEE Wireless Power Technology Conference and Expo (WPTCE), 2025-06-03, Rome. 2025-06-03p. 1-4

IEEE

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Wireless sensors are essential elements for Internet of Things (IoT) applications. However, most wireless sensors use batteries as power supplies, which limits their deployment and introduces potential maintenance challenges. This paper proposes a passive battery-free backscatter based on a Schottky diode that can convert DC resistive load variations into RF impedance changes, thus varying the magnitude of reflected RF signals. The circuit prototype was measured with a pulse mode vector network analyzer (VNA) at −25dBm excitation from 800MHz to 1.5GHz. Measurement results indicate that the difference between the maximum and minimum magnitude of the backscattered signal identified by S11 reaches 0.223 at 1.003GHz. These preliminary results validate that the proposed backscattering technique is well-suited for enabling amplitude modulation (AM) or phase modulation (PM) communications for zero-power IoT sensing.< Réduire

Mots clés en anglais

Backscattering

IoT

Simultaneous wireless information and power transfer (SWIPT)

Schottky diodes

Wireless sensors

Zero power

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Zero-Power Backscattering Through DC-RF Impedance Conversion for Wireless IoT Sensing

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