一种多频段共口径宽带天线的设计

Design of a Multi-band Common Aperture Broadband Antenna

本文设计了一种多频段共口径宽带天线,并对其进行了分析。利用多边形贴片天线和宽频带匹配技术相结合的方式实现四倍频的超宽带天线,同时将另外一个频段的独立天线集成到其内部,实现共口径应用。同时通过在内部天线周围增加金属条寄生单元来改善外部天线对其方向图的影响。结果表明天线在电压驻波比小于3.5时,外部天线的带宽达到了4倍频,同时具有良好的增益。内部天线在电压驻波比小于2时,带宽达到了2倍频,同时具有良好的增益和不圆度。

In this paper, a multi-band common aperture broadband antenna is designed and analyzed. Utilizing a combination of polygonal patch antennas and broadband matching technology to achieve a quadruple-frequency UWB antenna. At the same time, the independent antenna of the other frequency band is integrated into it to realize the common aperture application. The influence of the external antenna on its pattern is improved by adding a metal strip parasitic unit around the internal antenna. The results show that when the VSWR of the antenna is less than 3.5, the bandwidth of the external antenna reaches 4 times the frequency and a good gain. When the VSWR of the internal antenna is less than 2, the bandwidth reaches 2 times the frequency, and a good gain and roundness.