用于表面热疗治疗的小型化434mhz腔封装贴片天线

IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Muthu Rattina Subash Ramu;Kavitha Arunachalam
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引用次数: 0

摘要

一种封装在平面金属腔内的434 MHz贴片天线被报道用于热疗(HT)治疗浅表癌症。优化后的贴片天线尺寸为3.6 cm × 3.6 cm,回波损耗> 20 dB, -10 dB带宽为14 MHz,近场以切向电场为主,频率为434 MHz。模拟观测到的天线有效场尺寸(EFS)和穿透深度分别为17.22 cm2和1.26 cm。在异质人体模型上对采用大块人体组织优化的天线进行了评估,然后在模拟组织模型和离体牛组织上进行了实验验证。组织模型中测得的热EFS (TEFS)和热有效穿透深度(TEPD)分别为20.92 cm2和2.05 cm,与模拟中测得的18.61 cm2和2.19 cm相当。在均匀组织模型和异质离体牛组织上的实验表明,局部功率沉积与模拟结果一致。金属封装贴片天线,其电磁场与孔径面积比为1.33,适合于局部浅表性肿瘤的HT治疗。该方法可用于设计可调节加热模式的平面阵列,用于治疗大面积弥漫性浅表癌。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Miniaturized 434 MHz Cavity Encapsulated Patch Antenna for Superficial Hyperthermia Treatment
A 434 MHz patch antenna encapsulated in a planar metal cavity is reported for hyperthermia (HT) treatment of superficial cancers. The optimized patch antenna is 3.6 cm $ \times$ 3.6 cm with return loss > 20 dB, ―10 dB bandwidth of 14 MHz, and predominantly tangential electric field in the near field at 434 MHz. Antenna effective field size (EFS) and penetration depth observed from simulation are 17.22 cm2 and 1.26 cm, respectively. The antenna optimized using bulk body tissue was assessed on heterogeneous human body model followed by experimental verification on tissue-mimicking phantom and ex-vivo bovine tissues. Thermal EFS (TEFS) and thermal effective penetration depth (TEPD) of 20.92 cm2 and 2.05 cm measured in tissue phantoms are comparable to 18.61 cm2 and 2.19 cm determined in simulations. Experiments on homogeneous tissue phantom and heterogeneous ex-vivo bovine tissues show localized power deposition in agreement with the simulations. The metal encapsulated patch antenna with EFS to aperture area ratio of 1.33 is well suited for HT treatment of localized superficial cancer. It is also concluded that it could be used for designing planar array capable of delivering adjustable heating pattern to treat large area diffused superficial cancers.
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来源期刊
CiteScore
5.80
自引率
9.40%
发文量
58
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