| 摘要: |
| 为了避免现存的一些窄带通信系统对超宽带天线的干扰，提出了一种具有双陷波特性的超宽带天线结构。由于采用了渐变式阶梯阻抗匹配结构作为超宽带基础天线的馈电，使天线具有了宽阻抗匹配能力。通过在基础天线背面附加双偏T寄生单元和在辐射贴片上开窗的联合方法，实现了超宽带天线的双陷波特性。天线电流分布结果可以完全反映出在陷波频率下两种方法的谐振抑制作用，而且实验结果表明该结构的天线对 WLAN(5.15～5.825 GHz) 和WiMAX(3.4～3.69 GHz)频段的信号起到了有效的抑制作用，同时在工作频段内表现出较好的全向辐射特性。 |
| 关键词: 超宽带天线 陷波 渐变式阶梯阻抗匹配 偏T形寄生单元 开窗 |
| DOI： |
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| 基金项目:黑龙江省自然科学基金资助项目(ZD201115); 黑龙江工程学院青年科学基金项目(2013QJ09) |
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| Design of a dual band-notched UWB antenna with novel planar structure |
| ZHU Xiao-ming,YANG Xiao-dong,CHEN Peng |
| () |
| Abstract: |
| To avoid interference from existing narrowband communication systems,an ultra wideband (UWB) antenna with dual band-notched function is proposed. The modified base antenna structure has a wide impedance matching characteristic because of gradual stepped impedance feeder. The proposed antenna realizes dual band-notched function for UWB antenna by combining two biased T-shaped parasitic elements in the rear side with a window aperture on the radiation patch. The antenna current distributions reflect resonant suppression of the two methods. Besides, the experimental results demonstrate that the proposed antenna prevents signal interference from WLAN (5.15～5.825 GHz) and WiMAX (3.4～3.69 GHz) effectively. However it has better omnidirectional radiation patterns in working frequencies. |
| Key words: UWB antenna notched band gradual stepped impedance matching biased T-shaped parasitic element window operation |
