本文選題：小型化 + 北斗　； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：論文結(jié)合科研項(xiàng)目進(jìn)行選題研究，主要研究工作分為兩個(gè)部分，第一部分研究工作為研制了小型化手持終端天線的工程樣機(jī)，達(dá)到了技術(shù)指標(biāo)要求，天線樣機(jī)已交付甲方單位使用，使用效果良好；第二部分研究工作為設(shè)計(jì)了寬帶寬波束圓極化天線，達(dá)到了技術(shù)指標(biāo)要求，為后續(xù)樣機(jī)加工奠定了一定的技術(shù)基礎(chǔ)。 論文的主要研究內(nèi)容為： 一，小型化手持終端天線的工程樣機(jī)研制 針對小型化手持終端天線的技術(shù)指標(biāo)要求，闡述了北斗與GPS衛(wèi)星天線的發(fā)展歷史和研究現(xiàn)狀，指出了天線小型化與降低多天線工作耦合的設(shè)計(jì)難點(diǎn)，討論了終端天線小型化與降低多天線耦合的設(shè)計(jì)方法。采用Ansoft HFSS仿真軟件對小型化終端天線進(jìn)行仿真分析與設(shè)計(jì)，仿真結(jié)果表明，天線在要求工作頻帶內(nèi)，電壓駐波比小于2；極化方式為圓極化；天線方向圖在方位面為全向；俯仰面30°至90°增益大于-5dB。在此基礎(chǔ)上研制了天線的實(shí)驗(yàn)樣機(jī)，并對其電性能進(jìn)行了測量。測量結(jié)果表明，所設(shè)計(jì)的小型化終端天線在頻帶要求范圍內(nèi)駐波特性良好，實(shí)現(xiàn)方位面全向輻射的指標(biāo)要求�？梢�，文中研制的天線樣機(jī)滿足工程應(yīng)用的需求。 二，寬帶寬波束圓極化天線的設(shè)計(jì) 根據(jù)寬帶寬波束圓極化天線的工程應(yīng)用要求，指出了天線應(yīng)同時(shí)具有寬頻帶、寬波束，圓極化特性的設(shè)計(jì)難點(diǎn)。在對傳統(tǒng)口徑耦合微帶圓極化天線進(jìn)行分析比較的基礎(chǔ)上，，通過加載合適的饋電網(wǎng)絡(luò)提高天線的輻射特性，增加錐臺(tái)結(jié)構(gòu)，采用T形排列的漸變H形縫隙耦合饋電結(jié)構(gòu)，設(shè)計(jì)了一種雙層貼片形式的口徑耦合微帶天線。采用Ansoft HFSS仿真軟件對所設(shè)計(jì)的天線進(jìn)行仿真分析，結(jié)果表明，天線在工作頻段內(nèi)阻抗特性與輻射特性有較好的一致性，其駐波系數(shù)小于2，軸比小于6dB，波束寬度優(yōu)于指標(biāo)要求，滿足寬帶寬波束圓極化天線的基本要求，可作為寬帶圓極化陣列的備選方案，為后續(xù)研制樣機(jī)奠定了一定的技術(shù)基礎(chǔ)。
[Abstract]:The research work is divided into two parts. In the first part, the engineering prototype of miniature hand-held terminal antenna is developed, which meets the technical requirements. The antenna prototype has been delivered to Party A for use, and the effect is good. In the second part, the broadband wide-beam circular polarization antenna is designed, which meets the technical requirements and lays a certain technical foundation for the subsequent prototype processing. The main contents of this thesis are as follows: Development of engineering prototype for miniaturized hand-held terminal antenna According to the technical requirements of miniaturized hand-held terminal antenna, the development history and research status of Beidou and GPS satellite antenna are expounded, and the design difficulties of miniaturization of antenna and reduction of multi-antenna working coupling are pointed out. The design method of miniaturization of terminal antenna and reduction of multi-antenna coupling is discussed. The simulation analysis and design of miniaturized terminal antenna are carried out by using Ansoft HFSS simulation software. The simulation results show that the voltage standing wave ratio is less than 2, the polarization mode is circular polarization, the antenna pattern is omnidirectional in azimuth plane, the voltage standing wave ratio (VSWR) is less than 2, and the antenna pattern is omnidirectional in azimuth plane. The gain of pitch plane from 30 擄to 90 擄is greater than -5 dB. On this basis, the experimental prototype of antenna is developed and its electrical performance is measured. The measurement results show that the designed miniaturized terminal antenna has good standing wave characteristics in the range of frequency band requirements and achieves the requirements of azimuth omnidirectional radiation. It can be seen that the antenna prototype developed in this paper meets the requirements of engineering applications. Design of Wideband Wide-beam Circular polarization Antenna According to the requirement of engineering application of broadband wide-beam circular polarization antenna, it is pointed out that the antenna should have the characteristics of wide band, wide beam and circular polarization at the same time. Based on the analysis and comparison of the traditional aperture coupled microstrip circularly polarized antenna, the radiation characteristics of the antenna are improved by loading a suitable feed network, and the conical structure is added. An aperture coupled microstrip antenna with double layer patch is designed. The Ansoft HFSS simulation software is used to simulate and analyze the antenna designed. The results show that the impedance characteristics and radiation characteristics of the antenna are in good agreement in the working frequency band, the standing wave coefficient is less than 2, the axial ratio is less than 6 dB, and the beam width is better than the target requirement. It can be used as an alternative scheme for broadband circular polarization array, which can meet the basic requirements of wide-band wide-beam circular polarization antenna and lay a certain technical foundation for the subsequent development of prototype.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN821.1

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本文編號(hào)：1941198