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This chapter introduces a stent antenna system designed for deep implantation in endovascular aneurysm repair (EVAR) for abdominal aortic aneurysm (AAA) treatment. The stent antenna features multiple helical wires arranged in meshed rings and includes a single feed wire, which addresses the issue of uneven current distribution on the stent struts. Beyond its application in EVAR, the stent antenna is noted for its superior characteristics, including an omnidirectional radiation pattern, high gain, and optimal impedance matching. It operates over a broad frequency range from 850 to 950 MHz, encompassing the industrial, scientific, and medical (ISM) bands at 868 and 915 MHz. The antenna achieves peak gain values of −20.75 dBi at 868 MHz and −19.04 dBi at 915 MHz. The system’s performance was evaluated through finite-element method (FEM) and finite-difference time-domain (FDTD) simulations. Validation was achieved by testing the antenna with a 3D-printed AAA model in both a saline-filled phantom and minced pork. The results from simulations and physical measurements showed a strong correlation, providing initial validation of the stent antenna’s performance. Additionally, a link budget analysis was conducted to assess the biotelemetry performance of the system.

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Novel Development of Endovascular Aortic Stent System Featuring Promising Antenna Characteristics

  • 章节

  • 发表日期：

    2025年

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  • Syed Ahson Ali Shah

摘要

This chapter introduces a stent antenna system designed for deep implantation in endovascular aneurysm repair (EVAR) for abdominal aortic aneurysm (AAA) treatment. The stent antenna features multiple helical wires arranged in meshed rings and includes a single feed wire, which addresses the issue of uneven current distribution on the stent struts. Beyond its application in EVAR, the stent antenna is noted for its superior characteristics, including an omnidirectional radiation pattern, high gain, and optimal impedance matching. It operates over a broad frequency range from 850 to 950 MHz, encompassing the industrial, scientific, and medical (ISM) bands at 868 and 915 MHz. The antenna achieves peak gain values of −20.75 dBi at 868 MHz and −19.04 dBi at 915 MHz. The system’s performance was evaluated through finite-element method (FEM) and finite-difference time-domain (FDTD) simulations. Validation was achieved by testing the antenna with a 3D-printed AAA model in both a saline-filled phantom and minced pork. The results from simulations and physical measurements showed a strong correlation, providing initial validation of the stent antenna’s performance. Additionally, a link budget analysis was conducted to assess the biotelemetry performance of the system.