一种基于光子晶体的新型微带天线的设计

A new microstrip antenna design based on photonic band-gap structure

微带天线在通信、雷达等领域应用广泛,但传统微带天线存在尺寸较大、后向辐射严重等缺点。通过在普通微带天线的介质基板内,引入高度不同的周期性圆柱空气隙作为光子晶体,设计了一种新型微带天线,并利用HFSS 10.0软件对该天线进行仿真。仿真结果表明,光子晶体的引入提高了微带天线的辐射增益,削弱了沿基底方向的辐射,并减弱了天线的后向辐射,天线在整个工作频段内具有良好的辐射特征。

Conventional microstrip antenna has been widely applied in the fields of communication and radar, but it often holds a big size and its back radiation is serious. To overcome these problems, a new microstrip antenna with photonic band-gap structure was proposed, and the photonic crystal with different height was incorporated in the substrate of this an- tenna. The new antenna was simulated by using HFSS 10.0 software. The simulation results show that the radiation gain of the new antenna is increased, the surface radiation is weakened and the back radiation is reduced. This kind of antenna holds good radiation performances in its operation frequencies, which demonstrates the validity of the proposed new structure.