This paper describes a method of determination of the optimal sizes and locations of cylindrical air gaps inside the multi-slot coaxial antenna operating at 2.45 GHz. The dimensions of the microwave antenna with a 50-ohm coaxial feed were revised with regard to antenna reflection coefficient distributions. It should be emphasized that there are some differences between the operating frequencies of such antennas described in the literature and the resonant frequencies obtained from the antenna characteristics. It may significantly affect the interstitial hyperthermia treatment. It is also possible to resize the antenna slots to minimalize the S11-parameter value and obtain the best antenna impedance matching inside various tissues commonly treated in this method. The numerical implementation of such multi-physical problem is based on the finite element method.
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Electrical Engineering, Electronic engineering, Information engineering, Medical Engineering, Other Engineering and Technologies
Bibliography
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T. Zafar, J. Zafar, and H. Zafar, Development and microwave analysis of slot antennas for localized hyperthermia treatment of hepatocellular liver tumor, Australasian Physical and Engineering Sciences in Medicine, vol. 37, no. 4, pp. 673-679, 2014.
Collections
P. Gas, “Determination of the optimal multi-slot coaxial antenna sizes based on the microwave antenna reflection coefficient characteristics”, 2015 Selected Problems of Electrical Engineering and Electronics (WZEE), 17-19 September 2015, Kielce, Poland, IEEE, [pp. 1-4], 2015.
Available at: http://dx.doi.org/10.1109/WZEE.2015.7394015
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