基于铁氧体基底的频率可重构天线

Frequency reconfigurable antenna based on ferrite magnetic substrate

设计了一款基于铁氧体材料的频率可重构天线,天线结构为印刷偶极子形式。由于铁氧体基底的等效磁导率可以通过外加磁场来调节,因此天线的谐振频率会因等效电长度随磁场的变化而改变,从而实现天线谐振频率的可重构。通过全波电磁仿真对设计的天线性能进行了分析,结果表明其低反射谐振中心可通过外加偏置磁场在C波段内自由调节。最后,基于铁氧体基底材料设计加工天线实物样品,实际测试结果与数值仿真结果吻合较好。

A frequency reconfigurable antenna based on ferrite material is designed,and the antenna is a printed dipole with ferrite material as the substrate.The equivalent permeability of the ferrite substrate can be adjusted by the external static magnetic field,thereby,the electrical length of the proposed dipole antenna is changed,resulting in the resonant frequency reconfiguration.The performance of the designed antenna is analyzed through full wave electromagnetic simulation,showing that the antenna can realize frequency reconfiguration at C wave band.Finally,the antenna is fabricated based on ferrite substrate material,and the measurement results are consistent with simulation results.