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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。
In the existing body rewarming technology, RF rewarming is one of the most important research and development methods. Compared with other rewarming methods, RF rewarming has the characteristics of fast temperature rise, deep penetration depth of RF rewarming energy, high safety controllability and zero emission without electromagnetic pollution. The main research of a RF resonant cavity. Through theoretical design and software simulation optimization, RF resonant cavity design using TE11n-mode cylindrical resonator and monopole antenna excitation feed. When the water column model is under load, the resonant frequency of the RF rewarming resonator is within the range of 180 MHz ± 10 MHz, the VSWR of the fed-in signal is less than 1.2 and the reflection coefficient is less than 0.1. Under the equivalent human body model under the load condition, the resonant frequency The point is 204MHz, the designed RF resonant cavity can meet the resonant heating conditions, in line with the general requirements of biological RF uniform temperature.