| Circularly Rotated Array for Dual Polarized Applicator in Superficial Hyperthermia System |
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Ki Joon Kim, Woo Cheol Choi, Young Joong Yoon |
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Department of Electrical and Electronic Engineering, Yonsei University |
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| Abstract |
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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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