内嵌结构光子晶体在F型微带天线中的应用

Embedded Structure Photonic Crystal in the Applications of a F Type Microstrip Antenna

对常用的正方晶格光子晶体结构进行改进优化,设计出一种新型内嵌结构式二维光子晶体,即在普通正方晶格光子晶体内部嵌入同类晶格的光子晶体。将该结构光子晶体应用到F型微带天线中,采用平面波展开法,进行大量仿真计算。结果表明:与传统的微带天线相比,加入该结构光子晶体后的微带天线回波损耗由-18.2465dB降低到-41.0624dB。天线具有更好的阻抗特性和辐射效率,方向图有所改善,背瓣辐射最大处减少约5dB。这种新型的光子晶体微带天线达到了提高天线性能的目的。

In this paper,the structure of commonly used square lattice photonic crystal has been optimized. A new photonic crystal of embedded structure,which has been embedded in the gaps of square lattice with the same kind of square lattice,has been researched and designed. At the same time,this new structure photonic crystal is applied to F-type microstrip antenna for improving its performance. A large number of simulation calculations are made through plane wave analysis method. Compared with the traditional microstrip antenna,the data shows that the return loss decreases from-18. 2465dB to-41. 0624dB,and the microstrip antenna has better impedance characteristics and radiation efficiency. The antenna pattern has also been improved,and back lobe radiation decreases about 5dB at most. The new structure microstrip antenna with photonic crystal reaches the aim to improve the performance of the antenna.