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J Electromagn Eng Sci > Volume 15(1); 2015 > Article
Journal of Electromagnetic Engineering and Science 2015;15(1):20-25.
DOI: https://doi.org/10.5515/JKIEES.2015.15.1.20   
Circularly Rotated Array for Dual Polarized Applicator in Superficial Hyperthermia System
Ki Joon Kim, Woo Cheol Choi, Young Joong Yoon
Department of Electrical and Electronic Engineering, Yonsei University
Abstract
A circularly rotated array for a dual polarized applicator in a superficial hyperthermia system is proposed. The applicator has a wider effective treatment area due to the $180^{circ}$ phase shift. The dual polarized circularly rotated array (DPCRA) suppresses overheating at the center of the array and helps evenly distribute the heat. This array provides a more effective treatment area than a lattice array when a $2{times}2$ dual polarized array is fitted to the treatment area. The treatment area is 71.5% of the aperture, whereas the effective treatment areas of the $2{times}2$ dual polarized lattice array (DPLA) and the single polarized array (SPA) are 57.2% and 38.6% of the same aperture, respectively. The measurement matches the simulation results without blood circulation effects. In a $2{times}2$ array applicator, the proposed DPCRA has more heat uniformity than the DLA and the SPA.
Key words: Circularly Rotated Array, Dual Polarization, Heat Distribution, Microwave Array Applicator, SAR Distribution, Superficial Hyperthermia
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