【摘要】：隨著通信領(lǐng)域不斷發(fā)展,對天線的性能要求也越來越高。拓展天線帶寬的方法很多,但是大多數(shù)都有其局限性,或者不能夠明確從物理上洞察天線的輻射原理。本文將對基于模式分析的寬帶天線設(shè)計方法進行闡述和討論,并基于此完成了幾款寬帶天線設(shè)計。文中基于經(jīng)典特征模理論對天線端口特性進行了研究,并將串并聯(lián)諧振和模式諧振的關(guān)系作了分析。并聯(lián)諧振就是多個模式相互作用發(fā)生的諧振現(xiàn)象。而串聯(lián)諧振就是單個模式諧振的結(jié)果。這些論述通過分析偶極子和探針激勵的微帶天線得到印證。在天線設(shè)計部分分別對三種天線進行了分析、設(shè)計和實驗驗證。分別是四端口車載天線,層疊形式的微帶雙極化天線和交叉偶極子形式的雙極化天線設(shè)計。分別從模式諧振頻率,特征電流,特征場和端口特性分析了天線結(jié)構(gòu)及其諧振特性。對天線的輻射機理和設(shè)計思路進行了相對清晰的物理意義描述,并收到了較為理想的性能效果。總之,本文通過對特征模理論和天線端口諧振特性的研究,將特征模理論和天線設(shè)計進一步結(jié)合了起來。通過分析設(shè)計出了一款四端口天線和兩款寬帶雙極化天線。結(jié)果證明通過特征模理論,寬帶天線設(shè)計可以有效的通過多模天線的理論進行分析。與傳統(tǒng)的方法不同,這種模式分解理論為金屬天線設(shè)計提供了通用的有效方法和途徑。
[Abstract]:With the development of communication field, the performance of antenna is becoming more and more important. There are many ways to expand antenna bandwidth, but most of them have their limitations, or can not clearly understand the radiation principle of antenna. In this paper, the design method of broadband antenna based on mode analysis is described and discussed, and several broadband antennas are designed based on it. In this paper, the characteristic of antenna port is studied based on the classical eigenmode theory, and the relationship between series-parallel resonance and mode resonance is analyzed. Parallel resonance is the resonant phenomenon of multiple modes interaction. Series resonance is the result of single mode resonance. These discussions are confirmed by the analysis of microstrip antennas excited by dipoles and probes. In the part of antenna design, three kinds of antennas are analyzed, designed and verified by experiments. It is a four-port antenna, a stacked microstrip dual-polarization antenna and a cross-dipole dual-polarized antenna. The antenna structure and resonance characteristics are analyzed from the mode resonant frequency, characteristic current, characteristic field and port characteristics, respectively. The radiation mechanism and design idea of the antenna are described in a relatively clear physical sense, and an ideal performance effect is obtained. In a word, the characteristic mode theory and antenna design are further combined by studying the characteristic mode theory and the resonant characteristics of antenna port. A four-port antenna and two broadband dual-polarization antennas are designed. The results show that the design of wideband antenna can be effectively analyzed by the theory of multimode antenna. Different from the traditional method, the theory of mode decomposition provides a general and effective method for the design of metal antenna.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN822

【參考文獻】

相關(guān)博士學(xué)位論文 前1條

1 崔悅慧;新型寬帶平面基站天線研究[D];華南理工大學(xué);2014年

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本文編號：2393446