Title :
Characteristics of coaxial cable antenna with a ring slot for RTA
Author :
Im, Sung-pyo ; Park, Sung-kvo ; Choul-jun Park ; Park, Chong-haeli
Author_Institution :
Sch. of EIC Eng., Chosun Univ., Kwangju, South Korea
fDate :
Oct. 28 2003-Nov. 1 2003
Abstract :
Radiofrequency thermal ablation (RTA) is becoming one of the treatment for small but inoperable tumors of the liver. In this paper, we designed the applicator composed of coaxial cable antenna with a ring slot for RTA. To optimize the maximum output of radiation at 2450 MHz, we simulated the antenna using electromagnetic simulation tools Maxwell program and analyzed the return loss and the electric field E/sub tot/ at the near-field region between the simulation results and the experiment results. As a result, we could obtain the return loss of 29.786 dB at 2450 MHz only when the antenna is placed between two liver blocks of a pig, and the measurement results agreed with the simulation results well. Therefore, this coaxial cable antenna with a ring slot can be used very usefully as the applicator for RTA.
Keywords :
UHF antennas; antenna radiation patterns; coaxial cables; liver; optimisation; radiation therapy; slot antennas; tumours; 2450 MHz; 29.786 dB; RTA; coaxial cable antenna; electromagnetic simulation tools Maxwell program; liver tumors; near-field region; optimization; radiofrequency thermal ablation; ring slot; Analytical models; Applicators; Coaxial cables; Electromagnetic analysis; Electromagnetic fields; Electromagnetic radiation; Liver neoplasms; Near-field radiation pattern; Radio frequency; Slot antennas;
Conference_Titel :
Antennas, Propagation and EM Theory, 2003. Proceedings. 2003 6th International SYmposium on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-7831-8
DOI :
10.1109/ISAPE.2003.1276618
