渐近圆锥天线等效电路模型分析

Analysis of the Equivalent Circuit Model of Asymptotic Conical Antenna

提出利用二阶等效电路谐振角频率的解析方法,计算渐近圆锥天线等效电路寄生电感。采用3维全波电磁仿真的方法获得了渐近圆锥天线响应的幅频特性曲线,得到了天线的寄生电感。分别采用一阶和二阶等效电路模型计算了天线的幅频特性,与全波电磁仿真结果进行了对比。选取了不同上升沿的方波作为入射电场,仿真计算了天线负载输出电压,分别利用一阶和二阶等效电路模型重建了入射电场波形。结果表明,与一阶等效电路模型相比,二阶等效电路模型的重建电场波形前沿过冲相对更小,表明二阶等效电路模型比一阶等效电路模型模拟的结果更为准确。

A method to calculate the parasitic inductance of asymptotic conical antenna(ACA)by using the resonance angular frequency of second-order equivalent circuit is proposed.The amplitude spectra of the response of the ACA are achieved by three-dimensional full wave electromagnetic simulation,and the parasitic inductance of the ACA is calculated.The amplitude frequency characteristics of the antenna are calculated by using the first-order and the second-order equivalent circuit models,and compared with the full electromagnetic simulation results.The square waves with different rising time are selected as the incident electric field,the output voltage of the antenna load is simulated,and the waveforms of the incident electric field are reconstructed by using the first-order and second-order equivalent circuit models,respectively.The results show that compared with the first-order equivalent circuit model,the front overshoot of the reconstructed electric field waveform of the second-order equivalent circuit model is relatively smaller,which shows that the simulation result of the second-order equivalent circuit model is more accurate than that of the first-order equivalent circuit model.