一种小型平面陷波超宽带天线

A Compact Planar Ultra-Wideband Antenna with Notch Characteristics

为了抑制超宽带系统与窄带系统间潜在的干扰，提出了一种应用于超宽带系统的带陷渡结构的共面波导馈电小型平面超宽带天线．该天线采用印刷电路板上的矩形贴片作为辐射单元，通过在矩形贴片上开一个C形槽来实现陷波功能．仿真及测量结果表明，该天线在3．1～10．6GHz工作频段内的电压驻波比小于2，在5．0～6．0GHz频率范围内具有陷波特性，从而有效地阻隔了无线局域网系统对超宽带系统的影响，在整个工作频段内有稳定的增益和良好的辐射方向特性．

In order to minimize the potential interferences between the uhra-wideband system and the narrowband system, a compact coplanar waveguide fed planar antenna with band notch is presented for the uhra-wideband system. By taking the rectangular metal patch on a printed circuit board as the radiation element and by cutting a C-shaped slot in the rectangular patch, a frequency band notch is implemented. Simulated and measured results indicate that the proposed antenna yields an voltage-standing wave ratio （VSWR） of less than 2 in the impedance bandwidth range of 3.1 to 10.6 GHz, except the bandwidth of 5.0 - 6.0 GHz for band notch. Thus, the negative effect of WLAN on uhra-wideband system is eliminated and stable gain as well as good radiation patterns is obtained in the whole bandwidth range.