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Heating characteristics of array applicator composed of two coaxial-slot antennas for microwave coagulation therapy

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4 Author(s)
Saito, K. ; Fac. of Eng., Chiba Univ., Japan ; Hayashi, Y. ; Yoshimura, H. ; Ito, K.

Microwave coagulation therapy (MCT) has been used mainly for the treatment of small-size tumors. The operating frequency is 2450 MHz for the present MCT. In conventional MCT antennas, there exists a problem that the size of the coagulated region is insufficient. In this paper, the authors analyzed the heating characteristics of an array applicator composed of two coaxial-slot antennas by using computer simulation. The validity of the analysis was confirmed by the experiment using the liver of a pig. Moreover, the authors investigated the relation between the array spacing and heating volume produced by the two-antenna array applicator. As a result, the coagulated region required in the MCT could almost be achieved under the conditions that the net input power of each antenna was 50 W and the array spacing was 10 mm.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:48 ,  Issue: 11 )