【摘要】：本論文旨在研究高阻抗表面結(jié)構(gòu)在天線及天線陣列中的應(yīng)用。高阻抗表面結(jié)構(gòu)是電磁帶隙結(jié)構(gòu)中的一種,由金屬和介質(zhì)基板共同組成,其周期遠(yuǎn)小于工作波長,和其他電磁帶隙結(jié)構(gòu)一樣可以抑制表面波,同時(shí)在一定的頻帶范圍內(nèi)具有同相反射的特性。由于高阻抗表面具有上述特殊性質(zhì),現(xiàn)已被廣泛應(yīng)用于微波電路和微波天線領(lǐng)域。多頻帶、寬頻帶、小型化的新型高阻抗表面也成為學(xué)者們的研究熱點(diǎn)。 本文從高阻抗表面在天線及天線陣列中的應(yīng)用出發(fā),開展了較為深入的研究,主要的研究工作總結(jié)如下。首先,對(duì)高阻抗表面的同相反射特性和抑制表面波特性進(jìn)行了分析,并針對(duì)蘑菇型高阻抗表面研究其參數(shù)對(duì)前述兩種特性的影響,同時(shí)研究了斜入射時(shí)同相反射特性的變化。然后,針對(duì)單元間距較小的天線陣列,設(shè)計(jì)了寬度較窄的小型化帶支節(jié)單叉形高阻抗表面,利用其抑制表面波特性降低天線之間的互耦。此外,將其應(yīng)用在掃描陣列中,從而改善端口的阻抗匹配,特別是改善寬角度掃描時(shí)的駐波惡化現(xiàn)象,增大了掃描陣的波束掃描范圍。其次,還設(shè)計(jì)了基于倒錐形的小型雙頻單極子天線,可以在不改變天線整體形狀和尺寸的情況下靈活調(diào)節(jié)頻率比；針對(duì)該雙頻單極子天線,設(shè)計(jì)了雙頻高阻抗表面,利用其同相反射特性,實(shí)現(xiàn)了低剖面雙頻天線。最后,提出了變極化高阻抗表面的概念,利用45°金屬柵條以及高阻抗表面實(shí)現(xiàn)了極化扭轉(zhuǎn)的目的；并將其應(yīng)用于線極化單極子天線,在一定的頻段內(nèi)實(shí)現(xiàn)了圓極化的特性；同時(shí),研究設(shè)計(jì)了雙向變極化高阻抗表面,在此基礎(chǔ)上實(shí)現(xiàn)了低剖面雙頻圓極化天線。
[Abstract]:The purpose of this thesis is to study the application of high impedance surface structure in antenna and antenna array. High impedance surface structure is a kind of electromagnetic band gap structure, which is composed of metal and dielectric substrate, and its period is far less than the working wavelength. At the same time, in a certain range of frequency band has the characteristics of in-phase reflection. The high impedance surface has been widely used in microwave circuits and antennas due to its special properties. New high impedance surfaces with multi-band, wide-band and miniaturization have also become the research hotspot of scholars. Based on the application of high impedance surface in antenna and antenna array, this paper has carried out more in-depth research. The main research work is summarized as follows. Firstly, the in-phase reflection characteristics and suppression surface wave characteristics of high impedance surfaces are analyzed, and the effects of the parameters on the two characteristics are studied in view of the mushroom high impedance surfaces, and the variation of the in-phase reflection characteristics at oblique incidence is also studied. Then, for the antenna array with small cell spacing, a miniaturized single-forked high impedance surface with narrow width is designed to reduce the mutual coupling between antennas by using the characteristics of suppressing the surface wave. In addition, it is applied to the scanning array to improve the impedance matching of the ports, especially the deterioration of the standing wave in the wide-angle scanning, which increases the scanning range of the scanning array. Secondly, a small dual-frequency monopole antenna based on inverted cones is designed, which can flexibly adjust the frequency ratio without changing the overall shape and size of the antenna, and the dual-frequency high impedance surface is designed for the dual-frequency monopole antenna. The low profile dual-frequency antenna is realized by using its in-phase reflection characteristics. Finally, the concept of variable polarization high impedance surface is proposed, and the purpose of polarization torsion is realized by using 45 擄metal bars and high impedance surface, and it is applied to the linear polarized monopole antenna to realize the characteristics of circular polarization in a certain frequency range. At the same time, the bidirectional variable polarization high impedance surface is designed and the low profile dual frequency circular polarization antenna is realized.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN823.27

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 鄧q，

本文編號(hào)：2230864