一种基于康托集分形的超宽带陷波天线的研究与设计

提出了一种共面波导馈电的超宽带陷波天线.该天线采用康托集分形辐射单元,有效增加天线的阻抗带宽,使所设计的天线满足超宽带通信的需求.为了避免超宽带天线与传统的窄带系统之间的干扰,在共面波导接地面的顶部刻蚀一个U形槽,从而在5.1～5.9 GHz产生一个陷波特性,有效避免超宽带系统与窄带系统之间的干扰,实现超宽带系统与WLAN和WiMAX系统的协同工作.利用高频结构软件HFSS对设计的天线进行仿真分析,结果表明,在3.1～10.6 GHz频带范围内所设计的超宽带天线的回波损耗小于10 dB,并在5.1～5.9 GHz范围内回波损耗大于10 dB,实现了超宽带系统与IEEE802.11 a(5.1～5.9 GHz)的协同通信.

Design of a cantor set fractal UWB antenna with a notched band

A coplanar waveguide(CPW) fed ultra-wideband(UWB) antenna with a notched band is presented in this paper.The radiation patch of the antenna is designed by using cantor set fractal(CSF) technology,and the bandwidth of the designed UWB antenna is increased by using CSF and wide slot,thus the antenna can well meet the UWB application requirements.To overcome interference between UWB systems and exited narrow band systems,a U-shaped slot was cut on the top of the CPW ground plane,forming a notch band with a range from 5.1 to 5.9GHz which can reduce the potential interference between UWB and WLAN,WiMAX systems.The designed UWB antenna was simulated by mean of a high-frequency structure simulator(HFSS),and the simulation results show that the proposed antenna can cover the whole bandwidth from 3.1 to 10.6 GHz with a return loss less than-10 dB,while during the notch band the return loss is higher than-10 dB.The proposed UWB notched band antenna can satisfy the requirement of UWB systems and can reduce interference with IEEE802.11a applications.