摘要:
提出一种具有高功率容量的直线阵列天线,该天线阵基于矩形波导缝隙馈电,馈电耦合结构采用新型的弧形耦合缝隙,利用小螺旋天线作为辐射单元,通过旋转螺旋线内导体来调整各个辐射单元相位,从而实现一维波束扫描.采用等效传输法进行理论设计,数值模拟结果表明,该长度为3200 mm 的单元天线在中心频率8.40 GHz 上可获得的增益为27.50 dB,主瓣轴比为0.51 dB.功率容量约90 MW,辐射效率为97.10%,反射低于-24 dB,波束扫描范围±38°.
Abstract:
A linear array antenna with high power-handling capacity is designed in this article,which is feed through slots of rectangle wave-guide.A new cambered slot coupling structure is applied in the antenna,which radiation element is a small anten-na,and one dimension beam scanning is realized by rotating the inner conductor of the helical line to adjust the phase of the radia-tion element.The theoretical design is accomplished according to the equivalent transmission theory,the simulation results indi-cate that:one 3200.00 mm long array antenna has the gain of 27.50 dB at the frequency of 8.40 GHz,and the axial ratio is 0.51 dB.The power-capacity is about 90 MW,and the efficiency of the antenna is 97.10%.The reflectance is below -24 dB,and the beam scanning is ±38°.
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