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用于短距离高速无线通信的超宽带天线,不仅要有较小的尺寸,还要求较小回波损耗和良好的全向性。环形开口共面波导馈电结构可增大电流路径、实现天线的小型化,叉形主辐射单元渐变结构使天线在全频段内、特别是高频段向各方向均匀辐射。仿真结果表明,天线在3.1 GHz~10.9 GHz频带内回波损耗小于-10dB、驻波比小于2,H面方向图直到9.5GHz仍近似为圆形。天线结构紧凑,是一种高性能的低剖面小型化超宽带天线。
UWB antennas for short-range, high-speed wireless communications require not only small size but also small return loss and good omni-directionality. The annular opening coplanar waveguide feeding structure can increase the current path and realize the miniaturization of the antenna. The gradual structure of the fork main radiating unit enables the antenna to radiate uniformly in all directions, especially in the high frequency band. The simulation results show that the return loss of the antenna is less than -10dB in the band of 3.1 GHz to 10.9 GHz and the VSWR is less than 2. The H-plane pattern is still approximately circular until 9.5 GHz. Antenna compact structure, is a high performance low profile miniaturized UWB antenna.