一种新型宽频带高增益的变极化微带反射阵天线

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

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。

This article proposed a new kind of microstrip reflect array antenna, of which the polarization could be tuned among all polarization states instead of some fixed states in dual-or multi-polarized antenna. The key techniques approaching the polarized variability include the reflect array unit elements designed especially and the linearly polarized （LP） feed. Theoretical analysis shows that the reflected polarization covers all states; and that the duallor multi-layered unit structure sand- wiched with air-gaps can broaden bandwidth efficiently; and that adopting more elements can enhance antenna gain. As these advantaged features, this kind of antenna has potential significance for engineering applications in radar, communication, and etc. In this article, the complete theoretical analysis is given as well as a specific design sample to verify this method.