Compact self-grounded Bow-Tie antenna design for an UWB phased-array hyperthermia applicator
Journal article, 2017

Using UWB hyperthermia systems has the potential to improve the heat delivery to deep seated tumours. In this paper, we present a novel self-grounded Bow–Tie antenna design which is to serve as the basis element in a phased-array applicator. The UWB operation in the frequency range of 0.43–1 GHz is achieved by immersing the antenna in a water bolus. The radiation characteristics are improved by appropriate shaping the water bolus and by inclusion of dielectric layers on the top of the radiating arms of the antenna. In order to find the most appropriate design, we use a combination of performance indicators representing the most important attributes of the antenna. These are the UWB impedance matching, the transmission capability and the effective field size. The antenna was constructed and experimentally validated on muscle-like phantom. The measured reflection and transmission coefficients as well as radiation characteristics are in excellent agreement with the simulated results. MR image acquisitions with antenna located inside MR bore indicate a negligible distortion of the images by the antenna itself, which indicates MR compatibility.

UWB antenna

hyperthermia

near field performance indicators

phased-array applicator

Author

Pegah Takook

Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering

Mikael Persson

Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering

Johanna Gellermann

University Hospital Tübingen

Hana Dobsicek Trefna

Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering

International Journal of Hyperthermia

0265-6736 (ISSN) 1464-5157 (eISSN)

Vol. 33 4 387-400

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1080/02656736.2016.1271911

More information

Created

10/7/2017