Investigation of the OAM EM wave tissue irradiation at millimeter-wave frequencies

Andjelija Ž Ilić; Jelena Z Trajković; Slobodan V Savić; Milan M Ilić

doi:10.1016/j.apradiso.2024.111261

Investigation of the OAM EM wave tissue irradiation at millimeter-wave frequencies

Appl Radiat Isot. 2024 May:207:111261. doi: 10.1016/j.apradiso.2024.111261. Epub 2024 Feb 27.

Authors

Andjelija Ž Ilić¹, Jelena Z Trajković², Slobodan V Savić³, Milan M Ilić⁴

Affiliations

¹ Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080, Zemun, Belgrade, Serbia. Electronic address: andjelijailic@ieee.org.
² Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080, Zemun, Belgrade, Serbia. Electronic address: jelena.trajkovic@ipb.ac.rs.
³ School of Electrical Engineering, University of Belgrade, 11120, Belgrade, Serbia. Electronic address: ssavic@etf.bg.ac.rs.
⁴ School of Electrical Engineering, University of Belgrade, 11120, Belgrade, Serbia. Electronic address: milanilic@etf.bg.ac.rs.

PMID: 38432034
DOI: 10.1016/j.apradiso.2024.111261

Abstract

Recently, there has been an increase of interest in the use of electromagnetic (EM) waves with helical wavefronts, known as the orbital angular momentum (OAM) waves. Applications in the field of biomedicine have been foreseen, such as medical imaging and diagnosis, deep-tissue imaging, biosensing, and communication with medical implants. Other possible applications include various localized tissue treatments or tissue ablation. The available references mainly study the interaction of OAM light with biological structures, offering some insights into the biophotonics effects, but without the investigation of how to plan tissue exposures or how to estimate the EM field parameters in a particular case of application. We use the previously developed short dipole modeling of OAM EM fields to study the above problems by altering the OAM beam parameters and the distance from the target tissue. The results could guide the design of components and devices based on OAM EM waves.

Keywords: Biomedical applicators; Non-ionizing radiation; OAM source electrical size; Orbital angular momentum (OAM); Phased uniform circular antenna arrays (UCA); Short (Hertz) dipole modeling.