光子晶体微带天线的研究.docVIP

摘 要 微带天线由于具有很多优点而被广泛应用。但是微带天线可能会激励表面波，由于边界都是截断边界，表面波会向空间辐射能量，一方面降低了天线的效率，另一方面也会使方向图恶化，波瓣起伏和后向辐射增大，在战争中容易受到敌方的电子干扰和欺骗。 光子晶体可以阻止特定频段内电磁波的传播，如果在微带天线中引入光子晶体结构，就可望有效抑制微带结构中表面波的传播，使天线增益提高，同时降低天线的后向辐射，提高抗干扰性能，对发展高性能的相控阵雷达系统具有重大意义。 本文首先回顾了光子晶体发展史，介绍了其优点和运用，后对微带天线和HFSS作了简短的介绍，又说明了光子晶体的工作原理，最后在Ansoft HFSS中创建了同轴线馈电的微带天线和光子晶体，讨论了晶体层数和位置对增益影响，分析了S11和VSWR参数，画出了方向图，达到了较为理想的结果。 关键词：光子晶体、微带天线、天线增益 Abstract Microstrip antenna as have many advantages and are widely used, but microstrip antenna may be incentive SAW the border are cut off the border, the SAW to space radiation energy, on the one hand reduce the efficiency of the antenna, on the other hand will To map the direction of deterioration, lobed ups and downs and after the radiation increase, in the war vulnerable to the enemys electronic jamming and deception. Photonic crystals can block specific band of the electromagnetic wave transmission, if the microstrip antenna in the introduction of photonic crystal structure, is expected to inhibit the structure of the SAW microstrip transmission so that the antenna gain improved, while reducing the antenna after the radiation, raising anti - Interfere with performance, the development of high-performance phased array radar system is of great significance. This article first reviewed the history of the development of photonic crystals, introduced the use of its advantages and, after the microstrip antenna and HFSS made a brief presentation, explained the working principle of photonic crystals, in the final Ansoft HFSS in the creation of the coax feed Microstrip antenna and a photonic crystal, the crystal layers and discussed the location of the impact of the gain, of the S11 and VSWR parameters, to draw a pattern, to a more satisfactory results. Key words：Photonic crystalsMicrostrip antenna；Antenna gain 目录 摘要 I 目录 III 第一章 绪 论 1 §1.1光子晶体简介 1 §1.1.1 微波光子晶体起源 1 §1.1.2 微波光子晶体常见结构 2 §1.1.3光子晶体的应用范围 5 §1.1.3.1微波领域中的应用 5 §1.1.3.2.电子计算机中的应用 6 §1.1.3.3.电脑CPU芯片 7 §1.1.3.4.网络方面的应用 8 §1.2 微带天线简