宽带方向图可重构圆形单极子天线设计

Design of Wideband Directional Pattern Reconfigurable Circular Monopole Antenna

论文设计了一种具有宽频带、小型化的方向图可重构天线。首先,设计一款具有定向辐射特性的单极子天线通过加载二极管,改变二极管工作状态的方式改变天线的辐射特性,保证不同辐射状态下具有宽带特性,实现三个波束偏转的功能天线在3 GHz~4 GHz的全频段满足阻抗匹配特性。仿真结果表明天线在3 GHz~4 GHz频带S11小于-10 dB,最大辐射方向增益在5 dBi左右,且具有良好的辐射特性。

In this paper,a wide band,miniaturized directional pattern reconfigurable antenna is designed.Firstly,a mono-pole antenna with directional radiation characteristics is designed to change the radiation characteristics of the antenna by loading the diode and changing the working state of the diode.In order to ensure the broadband characteristics under different radiation states,the functional antenna with three beam deflection can meet the impedance matching characteristics in the full frequency band of 3 GHz~4 GHz.The simulation results show that the S11 of the antenna is less than-10 dB in the frequency band of 3 GHz~4 GHz,the maximum radiation direction gain is about 5 dBi,and the antenna has good radiation characteristics.