为了获得更小的天线尺寸和稳定的辐射模式,提出了一种共面波导(CPW)馈电的三维小型化圆形超宽带(UWB)天线。在圆形平面UWB单极子天线的基础上,通过在圆形辐射贴片和接地面上垂直加载金属翼的方式,实现了同时工作于无线局域网(WLAN)和UWB应用频段的小型化UWB天线设计。利用电磁仿真软件对天线性能进行了仿真。仿真结果表明:在2.39~10.76 GHz频段内,该天线反射系数小于-10 dB
峰值增益为1.3~4.6 dB
辐射效率大于80%
群延迟小于0.5 ns
面积为24 mm×29 mm。相对于传统的圆形平面UWB单极子天线,该天线尺寸减小了44%
在小型化无线通信设备中具有广阔的应用前景。
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references
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