医用介质部分加载波导辐射器

A dielectric-loaded waveguide applicator for medical use

本文报导一种带有抗流槽的介质加载波导辐射器的研制结果。这种辐射器有相对均匀的加热图形,泄漏辐射较其它波导辐射器小,能满足临床治疗需要。用小探针法测试了这种辐射器在模拟肌肉内近场分布,结果与用温度计测出的辐射器加热后的温度分布基本一致。实验还表明波导辐射器的抗流槽对宽边的泄漏辐射有明显抑制,但对窄边的泄漏抑制作用不很明显。

A dielectric-loaded waveguide applicator with chock is developed. It has relatively uniform heating pattern, less microwave leakage than similar waveguide applicator without chock and is suitable for clinic use. The near—field distributions of the applicaton in phantom muscle were measurecl using a short probe and the heating patterns were tested using a thermometer. Both results are in agreement basically. The experiment also shows that the chock mainly limits the leakage from the broad sides of the waveguide applicator.