Towards Integration of Ultrasonic-Powered Implantable Devices for Physiological Monitoring, Stimulation, and Imaging in Soft Tissues Using a Handheld Scanning Probe

Rosa, Bruno M. G.; Yang, Guang‐Zhong

doi:10.1109/jsen.2020.3026240

Cited by 7 publications

(1 citation statement)

References 34 publications

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“…The power and data are transmitted to a piezoelectric receiver (RX) connected to either a sensor (for collecting data) or an actuator (for stimulating its environment). The data can flow from the transmitter to the receiver (downlink communication for sending excitation commands) [2,15,16,18,20,43], from the receiver to the transmitter (uplink communication to transmit sensor data and device status) [1,4,6,8,10,11,14,41,42,[44][45][46], or in both directions either simultaneously (full-duplex) [40,47] or in turns (half-duplex/time multiplexing) [21,36,[48][49][50][51]. Downlink communication can be as simple as switching between turning the transmitter on and off, i.e.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric transducer design for simultaneous ultrasonic power transfer and backscatter communication

Allam

Sabra²,

Ertürk³

2022

Smart Mater. Struct.

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Ultrasonic waves can transfer power and data to sensors and devices deployed to traditionally inaccessible locations, such as inside the human body or deep in the ocean, eliminating the need for battery replacement. In ultrasonic power and data transfer systems, a piezoelectric transducer converts incident ultrasonic waves to useful electric power while transmitting data by modulating its reflected signal through backscatter communication. Existing approaches rely on reflecting a portion of the incident power to communicate, reducing the harvested power. This work realizes uninterrupted power harvesting with simultaneous backscatter communication through frequency multiplexing. A piezoelectric transducer is first designed and tested experimentally for high sensitivity and high bandwidth operation through low-loss broadband acoustic and electrical impedance matching. The transducer achieved 70% bandwidth at 1 MHz with a 10 dB difference between reflecting and absorbing incident ultrasonic waves. A frequency multiplexing technique is then developed to separate power and data into different frequency bands achieving simultaneous operation. The technique extends the range and bandwidth of ultrasonically powered devices such as biomedical implants and ocean monitoring sensors.

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Section: Introductionmentioning

confidence: 99%

Piezoelectric transducer design for simultaneous ultrasonic power transfer and backscatter communication

Allam

Sabra²,

Ertürk³

2022

Smart Mater. Struct.

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Feasibility Study on Subcutaneously Implanted Devices in Male Rodents for Cardiovascular Assessment Through Near‐Field Communication Interface

Rosa

Anastasova

Yang

2021

Advanced Intelligent Systems

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Monitoring of intrabody cardiovascular parameters can benefit from implantation of miniature devices close to anatomical targets, thereby surpassing signal attenuation problems related to the propagation toward body surface while allowing localized sensing at the target site with higher precision. With proper electronic miniaturization, packaging, robustness, and power consumption reduction, such devices can harvest enough energy from the surrounding environment for proper operation. Herein, a near‐field communication (NFC)‐powered implantable device with acquisition channels for electrocardiogram, arterial pulse, and temperature measurements is introduced. It has been successfully deployed inside rodents for a 72‐h trial period to assess external powering and data communication in living animals. Experimental results obtained by this device demonstrate the potential for providing more reliable diagnostic information than that of external wearable devices.

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Implantable LED for Optogenetics

Yang

Vázquez-Guardado

Rogers

2021

Series in Display Science and Technology

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Towards Integration of Ultrasonic-Powered Implantable Devices for Physiological Monitoring, Stimulation, and Imaging in Soft Tissues Using a Handheld Scanning Probe

Cited by 7 publications

References 34 publications

Piezoelectric transducer design for simultaneous ultrasonic power transfer and backscatter communication

Piezoelectric transducer design for simultaneous ultrasonic power transfer and backscatter communication

Feasibility Study on Subcutaneously Implanted Devices in Male Rodents for Cardiovascular Assessment Through Near‐Field Communication Interface

Implantable LED for Optogenetics

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