五陷波超宽带天线的研究与设计

Design and Research of Ultra-wideband Quintuple Band-notched Antenna

为滤除窄带信号对超宽带通信系统的干扰,研究并设计了一种具有五个陷波特性的超宽带天线。采用微带线馈电,在辐射贴片上刻蚀一个椭圆形开环谐振器,并在馈线旁制作了四个不同尺寸的U形寄生短截线,以实现天线的陷波特性,天线尺寸为30 mm×40 mm×0.8 mm。仿真实验验证了天线工作频率范围为2.8~12 GHz;有效滤除了WiMAX波段(2.94~3.42 GHz)、INSAT波段(4.42~4.53 GHz)、WLAN波段(5.32~5.5 GHz)、X波段上行频(7.01~7.27 GHz)和X波段下行频(7.57~8.05 GHz)。实测数据表明,天线的工作频段、方向性、增益及五个陷波特性等性能指标良好。

In order to filter the interference of narrowband signals to UWB communication systems, the paper studies and designs an UWB antenna with five band-notched characteristics. The design feeds by microstrip-line. Band rejection characteristics are realized by etching an elliptical open-loop resonator in the radiating patch and making four different-sized U-shaped parasitic stubs besides the feedline. The antenna size is 30 mm×40 mm×0.8 mm. The simulation experiment shows that the antenna operating frequency range is 2.8-12 GHz, effectively filters WiMAX band(2.94-3.42 GHz), INSAT band(4.42-4.53 GHz), WLAN band(5.32-5.5 GHz), the X-band uplink frequency(7.01-7.27 GHz) and the X-band downlink frequency(7.57-8.05 GHz). The measured results show that the antenna has a good performance index in working bandwidth, directivity, gain and five band-notched characteristics.