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矩形径向线螺旋子阵的设计是高功率高增益径向线螺旋阵列天线研究的基础,提出并设计了一个X波段双层16单元正方形径向线螺旋子阵,阐述了子阵的工作原理,简要介绍了X波段的辐射单元和耦合探针,重点分析了双层径向线馈电系统,从而得到了一个X波段的子阵模型,并对其进行了数值模拟,结果表明该子阵在8.6～10.1GHz的频带范围内,天线反射系数小于0.1,在9.0～10.0GHz的频带范围内,天线增益大于18.45dB,副瓣电平小于-11.68dB,轴比值小于1.66。
The design of rectangular radial spiral sub-array is the basis of high-power high-gain radial spiral array antenna. An X-band 16-element square radial spiral sub-array is proposed and designed. The working principle of sub-array , A brief introduction of the X-band radiating elements and coupling probes is given, and the double-layer radial line feeding system is analyzed emphatically. An X-band subarray model is obtained and numerically simulated. The results show that the subarray The antenna reflection coefficient is less than 0.1 in the frequency range from 8.6 GHz to 10.1 GHz. In the frequency range of 9.0 GHz to 10.0 GHz, the antenna gain is greater than 18.45 dB, the sidelobe level is less than -11.68 dB, and the axial ratio is less than 1.66.