基于分形理论弯折线对称振子天线的研究

Research of Meander Line Dipole Antenna Based on Fractal Theory

利用基于有限积分法的电磁仿真软件CST Microwave Studio对天线的谐振频率、谐振点输入阻抗、天线带宽、天线定向性等天线特性进行仿真研究,通过改变天线的几何形状找出它与天线特性参数之间的关系。结果表明,在不改变天线外部长度的情况下,通过改变天线的弯折次数、弯折角度、弯折高度、弯折置向等方法,可有效地降低天线的谐振频率,控制天线的输入参数,从而实现天线的电小化设计。这为分形天线的几何参数与电参数之间关系的研究提供理论依据与数据支持。

The resonant frequency of antenna, input impedance at resonant point, bandwidth of antenna, radiation characteristic and so on by using the simulation software CST Microwave Studio which is based on the method of limited integration are researched. The geometric parameters of antenna to identify the relationship between its geometric parameters and electrical parameters. The results show that changing the bending height, bending angle, bending times and bending direction of antenna can effectively reduce the resonant frequency, control the input parameters of antenna, then realize the miniaturization on the premise of not changing the external length of antenna. Theoretical basis and data support are provided for the relationship between geometric parameters and electrical parameters of fractal antennas.