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A coaxial slot antenna with frequency of 433 MHz for microwave ablation therapies: design, simulation, and experimental research

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Abstract

Investigation of the structures and properties of antennas is important in the design of microwave ablation (MWA) system. In this study, we studied the performance of the novel tri- and single-slot antennas with frequency of 433 MHz in ex vivo conditions. The dielectric properties of liver tissue under different thermal coagulation levels were explored, which was beneficial to evaluate ablation condition of tissue and simulate temperature field. Then, the performances of the antennas were analyzed by using numerical method based on finite element method (FEM). It indicated that the present antennas with frequency of 433 MHz could produce a gourd-shaped MWA area with a longer length. Compared to antenna with frequency of 2450 MHz, the designed single-slot antenna could obtain the larger MWA area. In addition, the multiple-point ablations and a larger MWA area could be achieved simultaneously by using the present tri-slot antenna. This study has a potential for the innovative design of MWA antenna for treatment of liver tumor with a large range and a long length.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (61378092 and 81601532), Jiangsu Science and Technology Support Plan (Social Development) (BE2016759), Foundation of Graduate Innovation Center in NUAA (kfjj20160303), Funding for Outstanding Doctoral Dissertation in NUAA (BCXJ14-07), Natural Science Foundation of Jiangsu Province (BK20160814), and Scientific Research Foundation of Nanjing University of Aeronautics and Astronautics (YAH16009). We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work; there is no professional or other personal interest of any nature or kind in any product, service, and/or company that could be construed as influencing the position presented in, or the review of, the manuscript entitled.

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Author notes

  1. Yingxu Jiang and Jinzhe Zhao contributed equally to this work.

Authors and Affiliations

  1. Department of Biomedical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    Yingxu Jiang, Jinzhe Zhao, Weitao Li, Yamin Yang & Zhiyu Qian

  2. Hunan Provincial Tumor Hospital/The Affiliated Tumor Hospital of Xiangya Medical School of Central South University, Changsha, 410013, China

    Jia Liu

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  1. Yingxu Jiang
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  2. Jinzhe Zhao
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Correspondence to Weitao Li.

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Jiang, Y., Zhao, J., Li, W. et al. A coaxial slot antenna with frequency of 433 MHz for microwave ablation therapies: design, simulation, and experimental research. Med Biol Eng Comput 55, 2027–2036 (2017). https://doi.org/10.1007/s11517-017-1651-9

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  • DOI: https://doi.org/10.1007/s11517-017-1651-9

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