本文關(guān)鍵詞： 線極化 圓極化 威爾金森功分器 空間映射算法 克里金插值法　出處：《江蘇科技大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：天線對于整個通信系統(tǒng)至關(guān)重要。近年來,對天線的研究成為了一個非常熱門的話題。按照極化方式的不同,天線可以分為線極化天線、圓極化天線和橢圓極化天線。線極化和圓極化天線是最常用的天線。相對于線極化天線所具有的優(yōu)點,目前圓極化天線正被越來越廣泛地應(yīng)用到衛(wèi)星通信、GPS、電視廣播等方面。本文主要采用空間映射優(yōu)化算法設(shè)計了圓極化微帶天線。文章簡單介紹了空間映射算法的基本思想、發(fā)展歷程和應(yīng)用前景,比較了幾種空間映射算法的優(yōu)缺點。空間映射算法中,粗模型的選取是關(guān)鍵。針對粗模型的建立,本文中介紹了幾種方法。對于矩形微帶貼片天線這樣具有經(jīng)驗公式的天線,可以使用經(jīng)驗公式作為粗模型;而對于沒有經(jīng)驗公式的微帶結(jié)構(gòu)天線,如本文設(shè)計的圓極化天線陣列,可以在ADS軟件中建立等效模型作為粗模型。對于既沒有經(jīng)驗公式、又無法建立它的ADS等效模型的天線,如本文設(shè)計的多層結(jié)構(gòu)的寬帶圓極化微帶天線,可以采用克里金插值法構(gòu)造它的響應(yīng)面近似作為粗模型,該方法大大擴(kuò)展了空間映射算法優(yōu)化天線的應(yīng)用范圍。本文設(shè)計的X波段的圓極化天線陣列,采用的是切角與挖槽相結(jié)合的方式來實現(xiàn)天線的圓極化特性。設(shè)計的多層結(jié)構(gòu)寬帶圓極化微帶天線,使用威爾金森功分器產(chǎn)生幅度相等、相位相差90°的激勵,通過縫隙耦合對輻射單元進(jìn)行饋電,獲得了性能良好的圓極化特性。天線優(yōu)化過程應(yīng)用到的空間映射算法,在優(yōu)化過程中可以體現(xiàn)該方法的快速性、準(zhǔn)確性、高效性。
[Abstract]:Antenna is very important for the whole communication system. In recent years, the research of antenna has become a very hot topic. According to the polarization mode, antenna can be divided into linear polarization antenna. Circular and elliptical polarization antennas. Linear and circular polarized antennas are the most commonly used antennas. At present, circular polarization antenna is more and more widely used in satellite communication, TV broadcasting and so on. In this paper, a circular polarized microstrip antenna is designed by using spatial mapping optimization algorithm. The basic idea of space mapping algorithm is introduced briefly in this paper. In this paper, the advantages and disadvantages of several spatial mapping algorithms are compared. In spatial mapping algorithm, the selection of rough model is the key. In this paper, several methods are introduced. For an antenna with an empirical formula such as a rectangular microstrip patch antenna, the empirical formula can be used as a rough model, while for a microstrip structure antenna without an empirical formula, For example, the circular polarized antenna array designed in this paper can be used as a rough model in the ADS software. For the antenna which has neither empirical formula nor its ADS equivalent model, For example, the broadband circularly polarized microstrip antenna with multi-layer structure designed in this paper can be used to construct its response surface approximation as a rough model by using Kriging interpolation method. This method greatly extends the application of spatial mapping algorithm to optimize antenna. The circular polarization antenna array in X-band is designed in this paper. The circular polarization characteristics of the antenna are realized by the combination of cutting angle and grooving. A multi-layer broadband circularly polarized microstrip antenna is designed. The Wilkinson power splitter is used to generate an excitation of equal amplitude and 90 擄phase difference. The slot coupling is used to feed the radiator and the circular polarization characteristics are obtained. The spatial mapping algorithm applied in the antenna optimization process can reflect the rapidity accuracy and high efficiency of the method in the optimization process.
【學(xué)位授予單位】：江蘇科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN822

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