Application of the condenser lens in microwave hyperthermia

来源 :Science China Technological Sciences | 被引量 : 0次 | 上传用户:m109bowen
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
According to the aplanatism theory,lens can be used to focus the electromagnetic wave. A plano-convex hyperboloid of revolution lens made of low loss material is designed for combinatorial applications with the rectangle microstrip applicator in microwave hyperthermia. Results of the extensive simulations and experiments show that the introduction of the lens to the clinical used antenna can significantly improve the directivity and hence increase the microwave power density in near field. In microwave hyperthermia applications,the lens antenna will exhibit superior directivity,high gain and well thermal efficiency for tumor in superficial layer. Besides,it has small treatment area that is helpful for reducing the injury of the normal tissue around the tumor. According to the aplanatism theory, lens can be used to focus the electromagnetic wave. A plano-convex hyperboloid of revolution lens made of low loss material is designed for combinatorial applications with the rectangular microstrip applicator in microwave hyperthermia. Results of the extensive simulations and experiments show that the introduction of the lens to the clinical applied antenna can significantly improve the directivity and hence increase the microwave power density in near field. In microwave hyperthermia applications, the lens antenna will exhibit superior directivity, high gain and well thermal efficiency for tumor in Besides, it has small treatment area that is helpful for reducing the injury of the normal tissue around the tumor.
其他文献
一、激发兴趣是自主学习的诱因首先,教师要树立以学生为主体的教学观。创设宽松和谐平等民主氛围,让学生想象驰骋,感情激荡,思路纵横,乃至异想天开,自然会碰撞出思想的火花,
WK4和WD400型挖掘机提升机构钢绳与卷筒的固定方式一直采用图1的结构。由图可 WK4 and WD400 type excavator lifting mechanism steel rope and reel fixing method has be
成语是我国传统文化的瑰宝,是表示人们长期以来习用的、简洁精辟的定型词组或短句。而广告是唤起大众对某种事物的注意而使用的一种手段,简单来说就是吸引消费者的眼球。现在
以轻质碳酸钙为基料,研制了两种具有较好防水性能的建筑防水粉.确定了这两种防水粉的基料和憎水添加剂的合理配比及制备的工艺条件. 2. Based on light calcium carbonate as t
[案例一]某校一次优秀教师的选举,学校采取了全员投票的办法,其中有一位大家公认的好老师以一票之差落选。而那位当选的教师在所有老师眼里都不被看好,工作吊儿郎当,为人心胸
有着“经济宪法”之称的《预算法》实施了18年,却修改了16年,何时才能定案?我们来听听全国人民代表大会财政经济委员会副主任委员吴晓灵的说法。吴晓灵,曾任中国人民银行副行
立体几何主要承载着对空间想象能力的考查,是每年数学高考的必考内容.而以立体几何中的平行、垂直、距离和角的问题为背景的探索性命题,是近年来高考数学命题创新的一个显著
本文介绍二次成井新工艺及其施工技术。 This article describes the new process of secondary well completion and its construction technology.
本文对光影的普遍性以及光影的景观效果在不同空间的应用进行探讨,同时探讨了光影在塑造景观空间意境的突出作用,强调光影在景观设计中的重要性。 This article discusses t
习作内容你平时一定做过不少小制作,比如折纸、剪纸、用橡皮泥捏动物或人物、用废旧物品(如易拉罐、药瓶等)做机器人、小娃娃等。请你任选一种,把所用的材料、制作方法和过程