Wireless powering electronics and spiral coils for implant microsystem toward nanomedicine diagnosis and therapy in free-behavior animal

► Miniaturized inductive coupling coils and LDO regulators powering module. ► High coupling coefficient link and high antenna efficiency are presented. ► Thermal protection design and SAR consideration avoid damages to implanted tissue. ► Full system performance demonstrates its capabilities for bat...

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Bibliographic Details
Published in:Solid-state electronics 2012-11, Vol.77, p.93-100
Main Authors: Chang, Chih-Wei, Hou, Kuan-Chou, Shieh, Li-Jung, Hung, Sheng-Hsin, Chiou, Jin-Chern
Format: Article
Language:English
Subjects:
Applied sciences
Batteryless microsystem
Circuit properties
Coil antenna
Coils
Computer science
control theory
systems
Control theory. Systems
Diagnosis
Electric potential
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Implantation
Low dropout regulator
Nanostructure
Power electronics, power supplies
Robotics
Signal convertors
Spirals
Therapy
Wireless powering
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Summary:► Miniaturized inductive coupling coils and LDO regulators powering module. ► High coupling coefficient link and high antenna efficiency are presented. ► Thermal protection design and SAR consideration avoid damages to implanted tissue. ► Full system performance demonstrates its capabilities for batteryless applications. In this paper, we present a wireless RF-powering electronics system approach for batteryless implantable biomedical microsystem with versatile sensors/actuators on laboratory animals toward diagnosis and therapy applications. Miniaturized spiral coils as a wireless power module with low-dropout (LDO) linear regulator circuit convert RF signal into DC voltage, provide a batteryless implantation for truly free-behavior monitoring without wire dragging. Presented design achieves low quiescent-current and Line/Load Regulation, high antenna/current efficiency with safety considerations including temperature and electromagnetic absorption issues to avoid damage to the implanted target volume of tissue. Related system performance measurements have been successfully completed to demonstrate the wireless powering capabilities in desired implantable microsystems.
ISSN:0038-1101
1879-2405
DOI:10.1016/j.sse.2012.05.020