Sun Bing, Jiang Guotai, Lu Xiaofeng, Cao Yi
School of Electronics and Information, Soochow University, Suzhou 215021, China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2010 Oct;27(5):974-7.
In clinical application of microwave hyperthermia, multi-applicators are often simultaneously required to irradiate the tumor because of its large volume or its deep location. Power divider separates the input microwave energy into equal, or unequal, energy to each applicator. In this paper, the design procedure for the three-section transmission-line transformer based one-to-two equal-split Wilkinson power divider is introduced. By impedance analysis on equivalent scheme, the design parameter of power divider is provided, and by simulation and optimization on Ansoft HFSS, a microstrip structure Wilkinson power divider operating frequency 2. 45 GHz is given. Measurement test results from network analyzer show that it has 25% bandwidth and good isolation in output with this structure. Besides, it is characterized by small size and easy processing. This power divider suits microwave hyperthermia.
在微波热疗的临床应用中，由于肿瘤体积大或位置深，常常需要多个辐射器同时照射肿瘤。功率分配器将输入的微波能量等分成或不等分成若干份，分别输送到各个辐射器。本文介绍了基于三段传输线变压器的一分二等功率分配威尔金森功率分配器的设计方法。通过对等效电路的阻抗分析，给出了功率分配器的设计参数，并利用Ansoft HFSS软件进行仿真优化，得到了工作频率为2.45GHz的微带结构威尔金森功率分配器。网络分析仪的测量结果表明，该功率分配器具有25%的带宽，输出端具有良好的隔离度。此外，该功率分配器还具有体积小、易于加工的特点，适合于微波热疗应用。
