Backscatter

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A Single-Transducer Ultrasound System for Concurrent Power Harvesting and Adaptive Backscatter Communication in Bio-Implants

A Single-Transducer Ultrasound System for Concurrent Power Harvesting and Adaptive Backscatter Communication in Bio-Implants 150 150
Author(s): Conghao Gao, Weiran Chen, Zhenghao Li, Yiqing Lan, Chenyuan Zhang, Yida Li, Yipeng Lu, Longyang Lin, Jiamin Li

Abstract:

Bioelectronic implants have enabled precise and closed-loop interfacing with biological systems to diagnose, monitor, and treat disorders. A critical challenge for these chronically implanted systems is the design of a robust, real-time wireless data uplink and a continuous, efficient wireless power delivery link within a severely constrained form factor. Ultrasound, …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 12
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3690876
Publisher: IEEE

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A Battery-Free BLE Backscatter Communication Chip for Wearable Systems

A Battery-Free BLE Backscatter Communication Chip for Wearable Systems 150 150
Author(s): Yongling Zhang, Ji Xiong, Junzai Chen, Xiaoyu Li, Jinrui Zuo, Yan Wang, Xiaoyi Wang, Miao Meng

Abstract:

This letter presents a backscatter chip that features bidirectional communication with commodity bluetooth low-energy (BLE) transceivers. For uplink, the chip reflects a reverse-whitened BLE tone into single-sideband (SSB) GFSK-modulated BLE packets via a proposed replica VCO-based GFSK modulator and an inductor-free SSB reflector. For downlink, the BLE packets are frequency …

Published in: IEEE Solid-State Circuits Letters
Page(s): 297 – 300
Year of Publication: 2025
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2025.3612423
Publisher: IEEE

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