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提出一种阻抗带宽比为12.9∶1的开槽结构的椭圆平面超宽带天线。该天线的辐射体采用扇形开槽的椭圆结构,而地板为矩形开槽结构,这两处适当位置合适尺寸的开槽使得天线得到了良好的阻抗匹配特性,进而实现了很好的超宽带特性。与以往所提出的超宽带天线相比,本天线尺寸更小,而带宽更宽,实现了在3.1～40GHz频带内反射损耗小于-10dB,在水平面的辐射方向图呈现良好的全向性。仿真和实验证明该天线具有良好的辐射特性及实用性,可以为现今及未来无线通信提供良好的选择。
A slotted elliptical planar UWB antenna with an impedance bandwidth ratio of 12.9: 1 is proposed. The radiating body of the antenna adopts a fan-shaped slotted oval structure, and the floor is a rectangular slotted structure, and the proper size slots at the two places enable the antenna to have good impedance matching characteristics and thus achieve very good ultra-wideband characteristics . Compared with the previously proposed ultra-wideband antenna, the antenna is smaller in size and wider in bandwidth, achieving less than -10dB reflection loss in the frequency band of 3.1-40GHz and good omni-directional radiation pattern in the horizontal plane. The simulation and experiment show that the antenna has good radiation characteristics and practicability, and it can provide a good choice for wireless communication today and in the future.