T型甚低频多调谐发射天线电容与电感研究

摘要

It is regarded generally according to VLF theory that the capacitance of T model multiple tuned VLF antenna will increase pro rata by the number of antenna groups, five or six groups are adopted usually. We analysed the equivalent capacitance and inductance by the metrical reactance of T model VLF single tuned VLF antenna and multiple tuned VLF antenna, and studyed the relationship of its' equivalent capacitance, inductance, power capacity to its' frequency and antenna groups. The result shows that the capacity of each antenna group decreases gradually ff the number of T model multiple tuned VLF antenna groups are overabundance,in fact the effect is limited to improve the power capacity and bandwidth when the antenna groups are more than three,it is an important guidance in the design of T model VLF multiple tuned transmit antenna.%甚低频天线理论认为,采用多调谐方式,T型甚低频多调谐天线可以基本按比例增加天线电容,在实际工程中常用五组或六组天线.本文利用甚低频天线输入电抗的实测值,计算了在不同频率下天线所呈现的等效电容和等效电感,研究了T型甚低频发射天线的等效电容、电感、功率容量与天线组数及频率之间的关系.研究结果表明T型甚低频多调谐天线的组数过多时,每组天线实际贡献的电容呈减小趋势,超过三组时对提高功率容量和带宽作用已不大,这一结论对T型甚低频多调谐发射天线设计有重要指导意义.