A Novel Efficient Wirelessly Powered Biotelemetric Endovascular Aortic Stent Antenna System

For the treatment of abdominal aortic aneurysm (AAA), this article presents a wirelessly powered stent antenna system for endovascular aneurysm repair (EVAR) comprising an in-body biotelemetric stent receiver (Rx) and off-body wireless power transmitter (Tx), operating at the industrial, scientific,...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2023-09, Vol.71 (9), p.1-1
Main Authors: Shah, Syed Ahson Ali, Basir, Abdul, Lim, Young-Hyo, Yoo, Hyoungsuk
Format: Article
Language:English
Subjects:
Abdominal aortic aneurysm
Aneurysm
Aneurysms
Antenna measurements
Antenna radiation patterns
Antennas
Aorta
Arteries
Biotelemetry
EVAR
High gain
Impedance matching
Mechanical drives
rectifier
stent antenna
stent graft
Stents
Stretchability
Struts
Three dimensional models
Three dimensional printing
Transmission efficiency
Wireless communication
wireless power
Wireless power transmission
Wireless sensor networks
Wires
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Summary:For the treatment of abdominal aortic aneurysm (AAA), this article presents a wirelessly powered stent antenna system for endovascular aneurysm repair (EVAR) comprising an in-body biotelemetric stent receiver (Rx) and off-body wireless power transmitter (Tx), operating at the industrial, scientific, and medical (ISM) bands (868, 915, and 2450 MHz). The Rx stent is composed of a single metallic wire in a serpentine-shaped helix aiding in the mechanical stretchability and random distribution of currents on the stent-struts. The simulated properties of the EVAR stent system were validated through measurements performed on a 3-D printed AAA model placed in a minced pork and a saline-filled ASTM phantom. The wireless power-reception capability and better antenna characteristics of the proposed stent system, such as omnidirectional radiation pattern, high gain, and perfect impedance matching, are among its key benefits in addition to EVAR application. The EVAR stent offers multiband coverage (720-1190 MHz, 2050-2560 MHz) and peak gains of -12.1, -11.7, and -22.4 dBi at the respective ISM bands, with a wireless power transmission efficiency up to 4% at 10 cm and 1.6% at 15 cm Tx-Rx separation. The rectifier exhibited a peak efficiency of 85% at an input power of 15 dBm. A link budget analysis demonstrated the stent's biotelemetric capabilities. The proposed EVAR stent exhibited a good agreement between the simulation and measured results, thereby serving as a first validation of wirelessly powered EVAR stent antenna.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2023.3291419