介绍了三角形栅格矩形径向线螺旋阵列天线的工作原理,设计并数值模拟了中心频率为4.0 GHz的三角形栅格矩形径向线螺旋阵列天线,并对此阵列天线进行了实验研究。实验结果表明:阵列天线在中心频率4.0 GHz 下,增益为15.3 dB,轴向轴比值1.58,驻波比为1.3,口径效率为86%;在3.8～4.2 GHz的频率范围内可实现圆极化定向辐射,增益大于14.9 dB,轴比值小于1.7,驻波比小于1.6。

A triangle-grid radial-line helical rectangular array antenna was proposed. Based on the backgrounds and the principle of the array antenna,the 8-element triangle-grid radial-line helical rectangular array antenna was studied by the numerical simulation at the central frequency of 4.0 GHz and experiments. Experimental results indicate that:at the central frequency of 40 GHz,the power gain is 15.3 dB,the axial ratio is 1.58 at the normal direction,the voltage standing wave ratio(VSWR) is 13 and the aperture efficiency is 86%. In the range of 3.8 GHz to 4.2 GHz,the power gain is above 14.9 dB,the axial ratio is below 1.7 and the VSWR is below 1.6.