一种新颖可控陷波特性的超宽带天线

A novel ultra-wideband antenna of controllable band-notched

设计了一种具有可控陷波特性的超宽带天线,有效抑制了超宽带通信系统与窄带通信系统之间潜在的干扰。该天线的尺寸仅为3.5 cm×3.5 cm×0.1 cm,使用微带线进行馈电,并通过在天线单元上加载支节,从而实现天线可控陷波特性。利用仿真软件HFSS对天线进行计算,对天线的阻抗、方向图特性进行仿真对比。仿真结果表明,天线在超宽带系统3.1 GHz～25 GHz工作频段内的电压驻波比(VSWR)小于2,在5.2 GHz～5.8 GHz频率范围内的滤波特性较好,有效降低了无线局域网系统对超宽带系统的影响,在工作频段内该天线的辐射方向特性和方向图特性都较为理想。

An ultra-wideband micro-strip antenna of controllable band-notched is studied in order to effectively restrain the potential interferences between narrow band communication system and ultra-wideband planar antenna communication system. The overall size of this kind of antenna is as small as 3.5 cm×3.5 cm×0.1 cm. It adopts micro strip line to feed through the antenna radiation unit section, and realizes its characteristics of controllable band-notched by loading a notch. The characteristic parameters are calculated by using the simulation software. The impedance and directional diagram characteristics of antenna are simulated and analyzed. The simulated results indicate that within the impedance bandwidth range of 3.1 GHz to 25 GHz, the Voltage Standing Wave Ratio（VSWR） is below 2 under ultra-wide band system; while within the bandwidth range of 5.2 GHz to 5.8 GHz, it realizes favorable characteristics of band-notched, therefore, the negative effect of WLAN on ultra-wide band system is reduced effectively. Moreover, the ultra-wideband micro-strip antenna possesses good directional radiation pattern and stable directional characteristics in the bandwidth range.