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本文用时域有限差分方法(FDTD)研究了微带阵列天线的时域散射场,分析了入射脉冲极化方向不同以及入射方向不同时的散射场的分布情况;讨论了时域散射场的时域波形以及频谱与微带阵列天线结构的关系;用散射场分离算法讨论了地板对于微带贴片阵列散射场的影响.研究发现,有限大地板的微带阵列天线的散射场主要是由地板的边沿电流产生的,同时微带贴片阵列的谐振频率与入射脉冲的极化方向有关,因此不同的极化方向对应于不同的散射频谱.
In this paper, the FDTD method is used to study the time-domain scattering field of the microstrip array antenna. The distribution of the scattering fields with different incident polarizations and different incident directions is analyzed. The time domain of the time-domain scattering field The relationship between the waveform and the microstrip array antenna structure is discussed and the influence of the floor on the scattering field of the microstrip patch array is discussed by using the scattering field separation algorithm.It is found that the scattering field of the microstrip array antenna with finite floor mainly consists of the floor The edge current is generated while the resonant frequency of the microstrip patch array is related to the polarization direction of the incident pulse so that the different polarization directions correspond to different scattering spectra.