混合小型化波导热疗天线设计

Design of Hybrid Miniaturized Waveguide Thermal Therapy Antenna

中文关键词:  微波热疗  小型化  波导天线  体模热疗

英文关键词:microwave thermal therapy  miniaturization  waveguide antenna  body modal heat therapy

中文摘要:

      热疗天线由于体积较大,辐射的微波能量范围也较大,天线设计使用较为复杂,不适用于治疗体积较小的肿瘤。针对这一问题设计了一种小型化波导热疗天线来治疗小体积肿瘤,考虑到透热深度与天线体积的兼顾,选用了 915 MHz的中心频率,使用混合小型化技术将天线小型化,即通过对天线加脊的同时加入短路探针将天线半径缩小到了 19 mm,其高为 36 mm。 比吸收率仿真时馈入 1 W 的能量最高点能够达到 45 W/ kg,温度场仿真时馈入 20 W 能量加热 30 分钟后最热的区域温度可达 45℃,体模实验结果与仿真实验相吻合,这些实验结果均表明其能够达到治疗乳房内部肿瘤的效果。

英文摘要:

      Due to the large size and large microwave energy range, the design and use of thermal therapy antenna is complicated, which is not suitable for treating small tumors. To solve this problem, a miniaturized waveguide thermal therapy antenna is de-signed to treat small tumors, and the center frequency of 915 MHz is chosen to balance the depth of heat transmission and the size of the antenna. The hybrid miniaturization technology is used to miniaturize the antenna. The antenna radius is reduced to 19 mm and its height is 36 mm by adding a short-circuit probe while adding a ridge to the antenna. The highest point is 45W/ kg when 1 W is fed, and the hottest area can be heated to 45°C after 30 minutes when 20 W is fed in the temperature field simulation, and the results of the body model experiments are consistent with the simulation experiments, which show that it can achieve the effect of treating internal breast tumors.