柱面共形蝶形微带天线的阻抗特性和方向图研究

研究了小曲率半径有限长度圆柱体上共形蝶形微带天线的阻抗特性和方向图.给出了不同曲率半径下的柱面共形蝶形微带天线反射损失和方向图的仿真结果.实际制作和测试了柱面共形微带天线的单元和二元阵列天线,仿真结果与实测结果比较吻合.研究表明:当圆柱半径较小时,不但方向图改变,而且谐振频率下降、阻抗带宽明显减小;当圆柱长度缩短时,方向图的起伏增大.

Impedance characteristics and radiation patterns of conformal cylindrical bow-tie microstrip antennas

The impedance characteristics and radiation patterns of conformal bow-tie microstrip antennas on a cylinder with small curvature radius and finite length were studied, and the simulation results of reflection loss and radiation patterns of the antennas with different curvature radius were presented. Then, a one-element antenna and a two-element array were constructed, and their reflection loss and radiation patterns were measured, respectively. It has been shown that the simulation results are good agreement with the measured data. It can be found that as the radius of cylinder became small, the radiation pattern produced a great change, the resonant frequency decreased and the impedance bandwidth reduced. Furthermore, the oscillation of radiation pattern increased as the length of cylinder was decreased.