Next week: Kalpesh Jaykar, 30-Sep-25, 12:20pm Central
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Ellad Tadmor
Sep 22, 2025, 9:32:23 PM (3 days ago) Sep 22
to aem-solid...@umn.edu
AEM Mechanics Research Seminar
Tuesday 30-Sep-2025, 12:20pm Central
Mr. Kalpesh Jaykar
Department of Aerospace Engineering and Mechanics, University of Minnesota
Title: Theoretical framework of passive ME antenna arrays enabling in-vivo monitoring: A pathway to smart implants
Abstract: In brain-computer interface (BCI) technology, a device known as the Stentrode is implanted on the surface of the brain motor cortex via the jugular vein, offering a promising solution for patients with severe disabilities. However, in such devices, the battery and electronics are wired and could introduce damage or implant malfunction. In these cases, a Stentrode integrated with magnetoelectric (ME) antennas could be of great interest. ME antennas offer significant advantages over traditional antennas, leveraging acoustic resonance rather than electromagnetic resonance to achieve a size reduction of up to five orders of magnitude. In addition to their compactness and immunity to ground-plane interference, ME antennas could be adopted for use in vascular implants, such as coronary stents, potentially enabling minimally invasive monitoring and communication. Despite these advantages, a single antenna embedded in the implant may be constrained by the limited volume of magnetostrictive material, which could result in low output gain. To address this gain limitation, we propose using antenna arrays designed to produce constructive interference at a designated far-field point, ideally located outside the patient, to enhance signal transmission and receiving capabilities. We develop a mathematical model to represent the antennas and optimize their spatial arrangement and phase synchronization. Simulations based on this model demonstrate promising high-gain performance at the prescribed far-field location through phase manipulation.
For more information, visit the AEM Mechanics Research Seminar website:
Tuesday 30-Sep-2025, 12:20pm Central
In-person: Room 313, Akerman Hall, University of Minnesota
Online: Webinar registration link
Department of Aerospace Engineering and Mechanics, University of Minnesota
Title: Theoretical framework of passive ME antenna arrays enabling in-vivo monitoring: A pathway to smart implants
Abstract: In brain-computer interface (BCI) technology, a device known as the Stentrode is implanted on the surface of the brain motor cortex via the jugular vein, offering a promising solution for patients with severe disabilities. However, in such devices, the battery and electronics are wired and could introduce damage or implant malfunction. In these cases, a Stentrode integrated with magnetoelectric (ME) antennas could be of great interest. ME antennas offer significant advantages over traditional antennas, leveraging acoustic resonance rather than electromagnetic resonance to achieve a size reduction of up to five orders of magnitude. In addition to their compactness and immunity to ground-plane interference, ME antennas could be adopted for use in vascular implants, such as coronary stents, potentially enabling minimally invasive monitoring and communication. Despite these advantages, a single antenna embedded in the implant may be constrained by the limited volume of magnetostrictive material, which could result in low output gain. To address this gain limitation, we propose using antenna arrays designed to produce constructive interference at a designated far-field point, ideally located outside the patient, to enhance signal transmission and receiving capabilities. We develop a mathematical model to represent the antennas and optimize their spatial arrangement and phase synchronization. Simulations based on this model demonstrate promising high-gain performance at the prescribed far-field location through phase manipulation.
For more information, visit the AEM Mechanics Research Seminar website:
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Ellad B. Tadmor, Ph.D.
Russell J. Penrose Professor
Department of Aerospace Engineering and Mechanics
University of Minnesota
https://dept.aem.umn.edu/~tadmor/
Russell J. Penrose Professor
Department of Aerospace Engineering and Mechanics
University of Minnesota
https://dept.aem.umn.edu/~tadmor/
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