超宽带天线矩形口径辐射特性研究

The study about radiated property of the UWB antennas rectangular aperture

本文利用惠更斯等效原理,从时域和频域两方面研究了超宽带天线矩形口径的瞬态辐射特性,以及能量传播特性的解析解.最后利用二维模拟论证了激励脉冲在自由空间的传播特性与天线口径几何尺寸、形状和主辐射面、辐射波形之间的关系,得出轴线上的辐射波形与口径形状无关,与口径面积大小成正比的模拟结论,为设计超宽带天线口径和为进一步设计超宽带电磁辐射提供了理论依据.

This paper, using Huygens＂ equivalent principle, study the UWB rectangular aerial ＂transient state both in time -domain and frequently-domain and the arithmetic formula of the energetic diffusion on the axis. In the end, the 2D simulation is utilized to prove the relation among spread characteristic in the free space of the encouraging pulse and aerial requirements geometry , the form ,main radiation , and the radiation wave form. And then we can get that the radiated waveform on the axis has nothing to do with the shape of the aperture , but in direct proportion to the size of the aperture. This research provided a theoretical basis for designing the radiated property of UWB aperture antennas and helping engineers to design UWB electromagnetic radiation.