2450MHz医用微波辐射天线的设计  

Design of A 2450MHz Microwave Radiant Antenna for Medicine

作　　者：杜永兴[1] 席晓莉[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,西安710048

出　　处：《微波学报》2006年第B06期86-89,共4页Journal of Microwaves

摘　　要：设计了一种工作在2450MHz频率的新型的医用微波热疗天线。采用有限元数值分析方法针对人体肌肉组织微波热疗模型,对单极辐射天线和改进的挽袖圆顶辐射天线在肌肉组织中产生的电磁场分布及单位质量电磁能量吸收率(SAR)进行了模拟计算,并且比较了挽袖圆顶天线和挽袖天线在2-3GHz频率之间的S11值。结果显示:挽袖圆顶天线通过优化的挽袖结构,减少了天线的能量反射,能量的分布不会随天线插入组织深度的不同而引起变化,优化的顶部结构可得到更好的反射特性。A new radiant antenna for microwave therapy is designed in the paper, working at 2450MHz. The finite element method is used to analyze the distributions of the electromagnetic fields and the specific absorption rate in muscle tissues to monopole radiant antenna and improved choke-vault antenna. S parameter of choke-vault antenna is compared with choke antenna＇s, working at 2-3GHz. The results show that the improved choke-vault antenna with a sleeve choke reduce back energy and make distributing of energy not depend on the antenna insertion depth into the tissue. The improved configuration of vault can obtain reflected characteristic better.

关 键 词：微波热疗 单极辐射天线 有限元法 电磁能量吸收率 

分 类 号：TN822[电子电信—信息与通信工程]