【摘要】：透波增強現(xiàn)象自發(fā)現(xiàn)以來吸引了眾多學(xué)者的關(guān)注。對透波增強現(xiàn)象的產(chǎn)生機理和應(yīng)用潛力研究,在微波新型材料、微波性能調(diào)控以及新型微波器件設(shè)計等領(lǐng)域有著重要的意義。本文從表面等離子體理論出發(fā),設(shè)計了金屬-介質(zhì)-金屬三層透波增強結(jié)構(gòu),分析了該結(jié)構(gòu)的透波機理。將透波增強現(xiàn)象應(yīng)用在多頻天線中,設(shè)計了一款新型雙頻高增益天線。本文的主要工作如下:(1)對透波增強特性和表面等離子體理論進行研究。研究發(fā)現(xiàn):金屬表面激發(fā)的傳播型表面等離子體在低頻時其色散曲線接近光在介質(zhì)中的色散曲線,高頻則趨近一條水平線,也就是傳播型表面等離子體的共振頻率;微小金屬顆粒激發(fā)局域型表面等離子體,而典型的局域型表面等離子體具有橫模和縱模兩種模式。(2)為了研究表面等離子體對透射增強現(xiàn)象的影響,本文設(shè)計了金屬-介質(zhì)-金屬三層透波增強結(jié)構(gòu)。金屬層分布周期性亞波長圓孔,在每個圓孔中添加金屬圓柱來激發(fā)局域型表面等離子體。仿真結(jié)果表明,對比傳統(tǒng)亞波長孔陣列結(jié)構(gòu),本文設(shè)計的三層結(jié)構(gòu)出現(xiàn)了第二個透射峰,說明兩類表面等離子體在透射增強現(xiàn)象中都有重要的作用。最后結(jié)合兩類表面等離子體的特性研究了結(jié)構(gòu)參數(shù)變化對透射特性的影響。(3)將透波增強現(xiàn)象應(yīng)用在天線設(shè)計中,設(shè)計一種新型的雙頻高增益天線。在金屬板中心開兩個相交圓孔,圓孔周圍分布環(huán)形凹槽,每個圓孔中心添加金屬圓柱,使用標(biāo)準(zhǔn)矩形波導(dǎo)饋電。仿真結(jié)果表明天線的中心頻率為11.9GHz和16.2GHz,增益分別為11.4dB和12.4dB,實物測試與仿真結(jié)果較吻合。該天線在天線設(shè)計和無線通信領(lǐng)域有較高的指導(dǎo)意義及應(yīng)用價值。
[Abstract]:The phenomenon of wave penetration enhancement has attracted the attention of many scholars since it was discovered. It is of great significance to study the mechanism and application potential of wave-permeation enhancement in the fields of new microwave materials, microwave performance control and new microwave device design. Based on the surface plasma theory, a metal-dielectric metal three-layer wave-permeable structure is designed, and the mechanism of the structure is analyzed. A new dual frequency high gain antenna is designed by applying the phenomenon of wave transmission enhancement to the multi-frequency antenna. The main work of this paper is as follows: (1) the enhancement characteristics and surface plasma theory are studied. It is found that the dispersion curve of the propagating surface plasma excited by the metal surface is close to that of the light in the medium at low frequency, while the high frequency tends to a horizontal line, that is, the resonance frequency of the propagating surface plasma. Small metal particles excite local surface plasmas, while typical local surface plasmas have two modes: transverse mode and longitudinal mode. (2) in order to study the effect of surface plasma on transmission enhancement, In this paper, a three-layer structure of metal-dielectric-metal reinforced wave transmission is designed. The metal layer distributes periodic subwavelength circular holes, and the metal cylinder is added to each hole to excite the local surface plasma. The simulation results show that a second transmission peak appears in the three-layer structure compared with the traditional sub-wavelength aperture array structure, which indicates that both kinds of surface plasmas play an important role in the transmission enhancement phenomenon. Finally, the effects of structural parameters on transmission characteristics are studied by combining the characteristics of two kinds of surface plasmas. (3) A new dual-frequency high-gain antenna is designed by applying the phenomenon of enhanced wave transmission to antenna design. Two intersecting circular holes are opened in the center of the metal plate. Circular grooves are distributed around the circular holes. Metal cylinders are added to the center of each hole, and the standard rectangular waveguide is used to feed the holes. The simulation results show that the center frequency of the antenna is 11.9GHz and 16.2 GHz, and the gain is 11.4dB and 12.4dBrespectively. The results of the physical test are in good agreement with the simulation results. The antenna has high guiding significance and application value in the field of antenna design and wireless communication.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN820

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相關(guān)期刊論文 前2條

1 楊文旭;宋鴻飛;雷建國;;金屬納米孔陣列透射增強的數(shù)值研究[J];激光與光電子學(xué)進展;2014年03期

2 易陳林;劉s，

本文編號：2417805