天线调谐器Π形匹配网络与鞭状天线适配仿真分析

Simulation analysis on Π-section matching network of antenna tuner in matching whip antennas

天线调谐器阻抗匹配网络对天线的适配与工作频率、网络参数、天线类型、匹配门限等因素相关。介绍了天线调谐器阻抗匹配网络的基本形式和参数配置;为获得匹配网络对天线适配性能的影响,以SG-230型天线调谐器Π形阻抗匹配网络为例,对匹配网络的匹配区域和匹配精度进行了仿真,分析了各参数对适用频段的影响,对比了理论值与实际值的差异,得到了不同条件下对匹配网络元件取值的约束;对不同尺寸的鞭状天线进行了适配仿真,对天线的适配频段、谐振频段等进行了分析讨论。分析结果表明,阻抗匹配网络适配鞭状天线时对天线尺寸,工作频段,元件取值的最优选择。

The basic forms and parameters setting of impedance matching network in antenna tuner are introduced at first. In order to find the effeetion on the performances of matching network in matching whip antenna, the П-section impedance matching network of SG-230 antenna tuner is used for simulation for the analysis on matching domain and matching precision. The effects of parameters on the usable frequency band are analyzed and the differences between theoretical values and actual values are contrasted. At last, the whip antennas with different sizes are simulated through being matched by the impedance matching network. The usable frequency band and resonance band are discussed. The simulation and analysis can be referenced theoretically in the design of matching network and tuning algorithms of antenna tuner and in matching whip antenna.