高功率微波照射下阿基米德螺旋天线响应特性

天线在高功率微波辐照下的响应特性分析是研究后端接收电路干扰特性及毁伤效应的依据。以典型的平面阿基米德螺旋天线为研究对象,利用理论分析和时域有限积分方法相结合,研究了该天线在高功率微波场作用下的时域和频域响应特性,并开展了相关的试验验证。结果表明,通过Friis 传输理论预估的发射功率和实际发射功率的误差在1 dB 量级,仿真得到的响应信号和测试得到的响应信号在时域波形和频谱特性上均吻合较好,仿真方法正确有效,为高功率微波照射下天线响应特性的研究提供了技术支撑。

The Response of an Archimedean Spiral Antenna to the Irradiation of the High Power Microwave

The response of antennas under the irradiation of high power microwave (HPM) plays a key role in the analysis of the response of jamming characteristics and damage effect for back end receiving circuits . In this paper, the response of a planar Archimedean spiral antenna under the irradiation of HPM is investigated,with the help of the time domainfinite integration technique together with the Friis transmission equation. The corresponding experiment has been done to validate the results obtained by the theoretical prediction and the EM simulation. The comparisons reveal that a difference of 1dB level for the transmitting power is achieved between the measured data and the theoretical prediction. Moreover, good a greements are also found between the simulated and measured data. It is shown that the analysis method proposed in this paper provides an effective way to investigate the response of antennas to the irradiation of the high power microwave.