A novel broadband and high-gain microstrip reflectarray antenna with variable polarization

This article proposes a new kind of microstrip reflectarray antenna,of which the polarization could be reconfigured among all the polarization states instead of some fixed states in a dual-or multi-polarized antenna.The mechanism for polarized variability is so simple that only mechanical rotation is needed.Theoretical analysis shows that the reflected polarization covers all states and that the dual-or multi-layered unit structure sandwiched with air-gaps can broaden the bandwidth efficiently.Moreover,it is demonstrated that adopting more elements can enhance antenna gain.With these advantageous features,this kind of antenna has the potential significance for engineering applications in radar,communication,etc.In this article,a complete theoretical analysis as well as a specific design sample is given to verify this method.

一种新型宽频带高增益的变极化微带反射阵天线

提出一种由微带反射阵实现的新型变极化天线,它区别于双/多极化天线的固定极化状态。实现变极化的关键是经特殊设计的反射阵阵元结构尺寸和线极化辐射的馈源。理论分析表明反射极化可涵盖所有极化状态;采用间以空气层的双/多层阵元结构能有效展宽频带;增加阵元数目可提高天线增益。鉴于这些特点,该类天线在雷达、移动通信等领域具有潜在工程应用。还给出了完整的理论分析和实例佐证。

一种渐变槽线作馈源的新型微带反射阵

提出了利用渐变槽线天线物理截面小的特点与变极化技术相结合的方法来改善微带反射阵馈源的遮挡效应,并设计了用于变极化微带反射阵馈源的渐变槽线天线及含37单元的微带反射阵。鉴于这些特点,该类天线在雷达、移动通信等领域具有潜在工程应用。文中给出了部分的理论分析和实例佐证。