L波段高功率线极化径向线阵列天线理论分析与数值模拟
High power linearly polarized radial waveguide array antenna for L-band
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摘要: 探索了L波段的高功率线极化径向线阵列天线。基于三角形栅格形式实现了径向线圆形平面阵列天线，分析并给出了径向线并联馈电网络，并以同轴馈电的水平单圆环线极化天线为基础，利用径向线并联馈电网络设计出了间距小于一个波长下L波段高功率线极化径向线阵列天线。研究结果表明：这种结构实现径向线阵列天线的线极化辐射是可行的，该天线在中心频率1.57 GHz下，增益为19.97 dBi，轴比为-52.06 dB，反射系数为0.105 2；在1.37～1.77 GHz的频率范围内增益大于18.64 dBi，轴向轴比值小于-46.45 dB。Abstract: A linearly polarized array antenna with radial waveguide for L-band was put forward, which can realize rotundity array antenna based on triangle grid. The multilayer radial waveguide and a horizontal ring antenna was researched, then the L-band linearly polarized array antenna with the array element space of less than one wavelength. The results indicate that this structure is feasible to realize the linearly polarized radial waveguide array antenna; the antenna gain is 19.97 dBi, the axial ratio is -52.06 dB and the reflection coefficient is 0.105 2 at 1.57 GHz; In the range of 1.37 GHz to 1.77 GHz , the gain is over 18.64 dBi and the axial ratio is below -46.45 dB.
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