Design of ultra-wideband antenna with triple band-notched characteristics
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摘要: 设计了一款基于共面波导(CPW)馈电小型化具有三陷波特性的超宽带天线。该天线采用矩形贴片组合作为辐射单元，通过在辐射贴片上开倒U型、圆弧形和S形缝隙来实现陷波功能，有效地抑制了WiMAX（3.3~3.7 GHz），WLAN（5.150~5.825 GHz）和X波段卫星通信系统下行频率段（7.25~7.75 GHz）对超宽带系统的干扰。结果显示：该天线在3.1~12.0 GHz内电压驻波比小于2，整个工作频段内具有稳定的增益和良好的辐射方向特性。Abstract: A compact coplanar-waveguide-fed ultra-wideband antenna with triple band-notched characteristics is designed. The antenna uses rectangle patches as a radiation unit. By etching nested inverted U-shaped, circular arc shaped and S-shaped slots, band-notched function is achieved in the three subbands of 3.3-3.7 GHz for worldwide interoperability for microwave access(WiMAX), 5.150-5.825 GHz for wireless local area networks(WLAN) and 7.25-7.75 GHz for the downlink of X-band satellite communication systems. The result shows that the voltage standing wave ratio(VSWR) of the antenna in the band of 3.1-12.0 GHz is less than 2. The proposed antenna has a stable gain and almost omnidirectional radiation patterns.
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