Microwave power penetration enhancement inside an inhomogeneous human head
Abstract The penetration of microwave power inside a human head model is improved by employing a dielectric loaded rectangular waveguide as the transmission source. A multi-layer reflection model is investigated to evaluate the combined material characteristics of different lossy human head tissues...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2021-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-01293-4 |
| _version_ | 1798034956259164160 |
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| author | Md. Rokunuzzaman Asif Ahmed Thomas Baum Wayne S. T. Rowe |
| author_facet | Md. Rokunuzzaman Asif Ahmed Thomas Baum Wayne S. T. Rowe |
| author_sort | Md. Rokunuzzaman |
| collection | DOAJ |
| description | Abstract The penetration of microwave power inside a human head model is improved by employing a dielectric loaded rectangular waveguide as the transmission source. A multi-layer reflection model is investigated to evaluate the combined material characteristics of different lossy human head tissues at 2.45 GHz. A waveguide loaded with a calculated permittivity of 3.62 is shown to maximise the microwave power penetration at the desired frequency. A Quartz (SiO 2) loaded rectangular waveguide fed by a microstrip antenna is designed to validate the power penetration improvement inside an inhomogeneous human head phantom. A measured 1.33 dB power penetration increment is observed for the dielectric loaded waveguide over a standard rectangular waveguide at 50 mm inside the head, with an 81.9% reduction in the size of the transmission source. |
| first_indexed | 2024-04-11T20:50:36Z |
| format | Article |
| id | doaj.art-f82a4c09dae8412f86a0d92e8e9a940e |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T20:50:36Z |
| publishDate | 2021-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-f82a4c09dae8412f86a0d92e8e9a940e2022-12-22T04:03:51ZengNature PortfolioScientific Reports2045-23222021-11-0111111210.1038/s41598-021-01293-4Microwave power penetration enhancement inside an inhomogeneous human headMd. Rokunuzzaman0Asif Ahmed1Thomas Baum2Wayne S. T. Rowe3School of Engineering, RMIT UniversitySchool of Engineering, RMIT UniversitySchool of Engineering, RMIT UniversitySchool of Engineering, RMIT UniversityAbstract The penetration of microwave power inside a human head model is improved by employing a dielectric loaded rectangular waveguide as the transmission source. A multi-layer reflection model is investigated to evaluate the combined material characteristics of different lossy human head tissues at 2.45 GHz. A waveguide loaded with a calculated permittivity of 3.62 is shown to maximise the microwave power penetration at the desired frequency. A Quartz (SiO 2) loaded rectangular waveguide fed by a microstrip antenna is designed to validate the power penetration improvement inside an inhomogeneous human head phantom. A measured 1.33 dB power penetration increment is observed for the dielectric loaded waveguide over a standard rectangular waveguide at 50 mm inside the head, with an 81.9% reduction in the size of the transmission source.https://doi.org/10.1038/s41598-021-01293-4 |
| spellingShingle | Md. Rokunuzzaman Asif Ahmed Thomas Baum Wayne S. T. Rowe Microwave power penetration enhancement inside an inhomogeneous human head Scientific Reports |
| title | Microwave power penetration enhancement inside an inhomogeneous human head |
| title_full | Microwave power penetration enhancement inside an inhomogeneous human head |
| title_fullStr | Microwave power penetration enhancement inside an inhomogeneous human head |
| title_full_unstemmed | Microwave power penetration enhancement inside an inhomogeneous human head |
| title_short | Microwave power penetration enhancement inside an inhomogeneous human head |
| title_sort | microwave power penetration enhancement inside an inhomogeneous human head |
| url | https://doi.org/10.1038/s41598-021-01293-4 |
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