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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。
The commonly used square lattice photonic crystal structure is optimized and optimized, a new type of embedded two-dimensional photonic crystal structure is designed, that is, a photonic crystal with the same crystal lattice is embedded in an ordinary square lattice photonic crystal. The structure of photonic crystal applied to the F-type microstrip antenna, the use of plane wave expansion method, a large number of simulation. The results show that compared with the traditional microstrip antenna, the return loss of the microstrip antenna with the photonic crystal structure is reduced from -18.2465dB to -41.0624dB. Antenna with better impedance characteristics and radiation efficiency, the direction of the figure has been improved, the maximum reduction of the back-lobes of about 5dB. This new type of photonic crystal microstrip antenna to achieve the purpose of improving antenna performance.