TE_(11n)模人体复温圆柱谐振腔射频仿真设计

Design and Simulation of TE_(11n) Mode Radio Frequency Resonance Cylinder Cavity for Human Rewarming

在现有人体复温技术中,射频复温是最近研究发展的重要方法之一。与其它复温方法相比,射频复温具有温升速度快、射频复温能量透射深度深、安全可控性高和零排放无电磁污染等特点。主要研究一种射频复温谐振腔。通过理论设计和软件仿真优化,射频复温谐振腔设计采用TE11n模圆柱谐振腔和单极子天线激励方式馈电。该射频复温谐振腔在水柱模型为负载情况下,谐振频点在180MHz±10MHz范围内,馈入信号驻波系数小于1.2,反射系数小于0.1;在等效人体模型为负载情况下,谐振频点为204MHz,设计的射频复温谐振腔可以满足谐振加热条件,符合生物大体射频均匀复温要求。

Within the human rewarming technolegies,the radio frequencye rewarming method is one of the main way.According to other technolegies,the radio freaquency rewarming has the advantage of the fast speed rewarming,the deeper transmission,the high safety and cleanliness. The paper is mainly to study on the radio frequency resonance cavity. The radio frequency resonance cavity works at the TE111 mode and the feed type is the unipolar antenna. On condition that the water is load of the radio frequency resonance cavity,the resonance frequency band is 180 MHz ± 10 MHz,the Voltage Standing Wave Ratio is less than 1. 2,and the reflection coefficient is less than 0. 1. The resonance frequency point is 204 MHz with the load is the human body. The simulation results of the radio frequency resonance cavity show that radio frequency performance can fulfil the need of human body rewarming.