Optimum design of a truncated-cone antenna element used in microwave irradiation of liquid objects

Issue title: Proceedings from the 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2015)

Guest editors: Fumio Kojima, Futoshi Kobayashi and Hiroyuki Nakamoto

Article type: Research Article

Authors: Murai, Masanori^{a; *} | Matsuoka, Shuji^b | Hirano, Takashi^b | Yamanaka, Yoshinari^b | Yamanaka, Kyoji^b | Takagi, Toshiyuki^c | Uchimoto, Tetsuya^c

Affiliations: [a] Kochi Prefectural Industrial Technology Center, Nunoshida, Kochi, Japan | [b] Kanematsu Engineering Co., LTD, Kochi, Japan | [c] Institute of Fluid Science, Tohoku University, Aoba-ku, Sendai, Japan

Correspondence: [*] Corresponding author: Masanori Murai, Kochi Prefectural Industrial Technology Center, 3992-3, Nunoshida, Kochi 781-5101, Japan. E-mail:[email protected]

Abstract: To eliminate microwave reflections from a truncated-cone antenna element used to irradiate liquid objects with microwaves, the element needs to be designed optimally. Three design parameters were used in the optimization, the objective function to be minimized being power reflection coefficient of the microwaves. An applicable range of relative permittivity for the liquid objects was identified. The characteristics of the antenna were checked in experiments using water. Also the temperature dependency of the antenna was checked in both numerical and experimental tests.

Keywords: Microwave heating, microwave irradiation, microwave antenna, optimum design

DOI: 10.3233/JAE-162136

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1525-1530, 2016