基于超材料的新型低剖面谐振腔天线

A New Type of Low Profile Resonant Cavity Antenna Based on Metamaterial

根据法布里-珀罗谐振腔理论,设计并测试了一款新型双S低剖面天线。该天线采用加载超材料表面的方法,用以降低法布里天线的谐振距离。理论分析发现,双S型超材料表面在特定频段内具有负相位特性,根据法布里-珀罗谐振条件可以降低谐振腔体天线的剖面。实验结果证明,天线的谐振距离降低至λ/12.7,远远小于传统天线的λ/2。

According to the theory of Fabry-Perot resonant cavity,a new type of double S low profile antenna is designed and measuremented. The antenna adopts the method of loading metamaterial surface to reduce resonant distance of Fabry-Perot antenna. Theoretical analysis shows that double-S metamaterial superstrate exhibits negative phase characteristic at special frequency band. According to the Fabry-Perot resonance condition,the profile of the antenna can be reduced. The results from measurement show that the resonant distance of the proposed antenna is reduced toλ /12. 7,which is far less than λ/2 of the conventional antenna.