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Broadband Dielectric Spectroscopy with a Microwave Ablation Antenna

Vidjak, Klementina ; Hessinger, Carolin ; Cavagnaro, Marta (2023)
Broadband Dielectric Spectroscopy with a Microwave Ablation Antenna.
In: Sensors, 2023, 23 (5)
doi: 10.26083/tuprints-00023348
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Broadband Dielectric Spectroscopy with a Microwave Ablation Antenna
Language: English
Date: 11 April 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Publisher: MDPI
Journal or Publication Title: Sensors
Volume of the journal: 23
Issue Number: 5
Collation: 21 Seiten
DOI: 10.26083/tuprints-00023348
Corresponding Links:
Origin: Secondary publication DeepGreen

Microwave ablation is a technique used to treat tumorous tissue. Its clinical use has been greatly expanding in the last few years. Because the design of the ablation antenna and the success of the treatment greatly depend on the accurate knowledge of the dielectric properties of the tissue being treated, it is highly valuable to have a microwave ablation antenna that is also able to perform in-situ dielectric spectroscopy. In this work, an open-ended coaxial slot ablation antenna design operating at 5.8 GHz is adopted from previous work, and its sensing abilities and limitations are investigated in respect of the dimensions of the material under test. Numerical simulations were performed to investigate the functionality of the floating sleeve of the antenna and to find the optimal de-embedding model and calibration option for obtaining accurate dielectric properties of the area of interest. Results show that, as in the case of the open-ended coaxial probe, the accuracy of the measurement greatly depends on the likeness between the calibration standards’ dielectric properties and the material under test. Finally, the results of this paper clarify to which extent the antenna can be used to measure dielectric properties and paves the way to future improvements and the introduction of this functionality into microwave thermal ablation treatments.

Uncontrolled Keywords: microwave ablation treatment, microwave ablation antenna, dielectric spectroscopy
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-233489
Additional Information:

This article belongs to the Special Issue Microwave Technologies for Biomedical Applications: from Sensing to Therapy

Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP)
Date Deposited: 11 Apr 2023 12:09
Last Modified: 14 Nov 2023 19:05
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23348
PPN: 509025676
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