CAJ | 학술논문

为研究对数周期天线（LPGA）的方波脉冲响应特性，利用 GTEM室和 CST仿真软件对 LPGA方波脉冲响应信号进行实验测试与仿真分析。利用实验室自行研制的超宽带电场测试系统对 GTEM室进行校准，得到了室内电场强度E（t）与方波源的输出电压V（t）和芯板高度h之间的关系；搭建GTEM室中天线脉冲响应测试平台，得到不同辐照方向下的 LPGA方波脉冲时域响应信号；利用CST仿真软件建立对数周期天线的3D模型，得到响应信号幅值的开路电路模型。
위연구대수주기천선（LPGA）적방파맥충향응특성，이용 GTEM실화 CST방진연건대 LPGA방파맥충향응신호진행실험측시여방진분석。이용실험실자행연제적초관대전장측시계통대 GTEM실진행교준，득도료실내전장강도E（t）여방파원적수출전압V（t）화심판고도h지간적관계；탑건GTEM실중천선맥충향응측시평태，득도불동복조방향하적 LPGA방파맥충시역향응신호；이용CST방진연건건립대수주기천선적3D모형，득도향응신호폭치적개로전로모형。
In order to acquire the transient response of a log-periodic antenna (LPGA),its inducted time signal under a square wave pulse was measured and analyzed using the GTEM cells and the full-wave analysis simulator CST.To calibrate GTEM cells,the distribution of electric field in it was measured using an ultra-wide band test system.The result reveals the relationship between the field intensity E(t)in GTEM cells and the input V(t),the height h.Then,the test system using GTEM cells was established to get the transient signal of LPGA.The response signal when it is illuminated by square wave plane of different orientation is obtained.The last,a 3D model of this antenna was established using simulator CST.The simulation analysis shows that the peak voltage of the transient signal is able to be calculated by the equivalent circuit with open-circuit voltage source.