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通过在超宽带印刷单极子天线上开设不同形状和尺寸的缝隙,设计了一种由共面波导馈电的,具有双频陷波特性的超宽带天线。并且通过对天线仿真结果的分析,总结出了缝隙结构参数对天线陷波特性的影响规律。仿真和实测结果表明,除陷波频带外,天线在3.1到10.6GHz频带上的VSWR小于2,在3.4-3.77GHz和4.91-5.87GHz频段上具有良好的陷波特性,较好地避免了系统与WiMAX及WLAN之间的干扰。在非陷波频段上天线具有较好的全向辐射特性。此外,通过对天线表面电流分布情况的详细分析,推导出了天线的等效电路结构。
An ultra-wideband antenna with double-frequency notch characteristics fed by coplanar waveguide is designed by providing different shapes and sizes of slots on UWB monopole antenna. And through the analysis of the antenna simulation results, summed up the gap structure parameters of the antenna notch characteristics of the law. The simulation and experimental results show that the VSWR of the antenna in the band of 3.1 to 10.6GHz is less than 2 except for the notch frequency band and has good notch characteristics in the frequency range of 3.4-3.77GHz and 4.91-5.87GHz, which is better avoided Interference between the system and WiMAX and WLAN. The antenna has better omnidirectional radiation characteristics in the non-notched band. In addition, through the detailed analysis of the current distribution on the antenna surface, the equivalent circuit structure of the antenna is deduced.