本文選題：多頻圓極化 + 多模導(dǎo)航天線��； 參考：《北京郵電大學(xué)》2014年碩士論文

【摘要】：近些年來,天線作為通信與導(dǎo)航設(shè)備的一個必要部件有了長足的發(fā)展。為了滿足人們各方面的需求天線的設(shè)計要考慮的因素也越來越復(fù)雜。移動通信技術(shù)與多模衛(wèi)星導(dǎo)航技術(shù)的發(fā)展,要求天線同時具有圓極化、多頻段、小型化等特點。本文首先介紹了現(xiàn)代衛(wèi)星導(dǎo)航技術(shù)的發(fā)展現(xiàn)狀,說明了多模衛(wèi)星導(dǎo)航系統(tǒng)的特點與優(yōu)勢,以及未來衛(wèi)星導(dǎo)航技術(shù)朝著多�；l(fā)展的必然趨勢,從而引出了多頻圓極化天線廣闊的應(yīng)用需求。接著本文總結(jié)了四臂螺旋天線與微帶天線實現(xiàn)圓極化與小型化的主要方法。 本文在理論研究的基礎(chǔ)上完成了一款三頻段、圓極化的堆疊式微帶天線的設(shè)計、仿真與加工測試工作。該天線具有結(jié)構(gòu)簡單、易于安裝、體積小、成本低等優(yōu)點。.天線的-10dB阻抗帶寬與3dB軸比帶寬都覆蓋了GPS的L1波段(1.575GHz)以及兩個S波段2.2GHz-2.4GHz,2.025GHz-2.11GHz。該天線在1.575GHz、2.05GHz、2.30GHz處的主極化增益為分別為5.42dBi,6.3dBi,6.09dBi,天線各方面的測試性能均可以滿足GPS導(dǎo)航應(yīng)用的需求。該天線的設(shè)計與仿真過程在全波電磁仿真軟件CST中進行,并給出了天線完整的設(shè)計與分析過程,從最簡單的微帶圓極化天線的分析開始,逐步進行改進與優(yōu)化,最終達(dá)到了比較理想的性能。為了更好地理解天線的工作原理,本文對天線的主要參數(shù)進行了掃描仿真分析,并對仿真結(jié)果進行了分析與總結(jié)。 本文還提出了兩款新穎的適用于手持終端的多頻圓極化天線,兩款天線的結(jié)構(gòu)類似,均采用立體式設(shè)計,有效地縮小了天線占用的空間。在HFSS中完成了對天線的仿真與參數(shù)優(yōu)化,對該天線進行了加工測試,測試結(jié)果與理論結(jié)果匹配效果良好,可以覆蓋GPS和Galileo的Ll波段、GLONASS的L1C/A波段、北斗系統(tǒng)的.B1波段和GPS的L2C波段。各項測試指標(biāo)都可以滿足導(dǎo)航應(yīng)用的需求。本文給出了天線設(shè)計的詳細(xì)過程,并對該天線結(jié)構(gòu)實現(xiàn)圓極化和雙頻化的原理進行了分析。本文還對天線結(jié)構(gòu)中的主要參數(shù)在HFSS中進行了掃描仿真,并給出了一系列的仿真結(jié)果的對比分析,總結(jié)了各個參數(shù)對天線性能影響的基本規(guī)律。
[Abstract]:In recent years, antenna as a necessary component of communication and navigation equipment has made great progress.In order to meet the needs of people, the design of antenna is more and more complicated.With the development of mobile communication technology and multimode satellite navigation technology, antenna must have the characteristics of circular polarization, multi-frequency band and miniaturization.This paper first introduces the development status of modern satellite navigation technology, explains the characteristics and advantages of multi-mode satellite navigation system, and the inevitable trend of the future satellite navigation technology towards multi-mode development.Therefore, the wide application requirement of multi-frequency circular polarization antenna is introduced.Then the main methods of circular polarization and miniaturization of four-arm spiral antenna and microstrip antenna are summarized.In this paper, a three-band circular polarization stacked microstrip antenna is designed, simulated and fabricated on the basis of theoretical research.The antenna has the advantages of simple structure, easy installation, small size and low cost.Both the -10dB impedance bandwidth and the 3dB axis ratio bandwidth of the antenna cover the L1 band of GPS (1.575GHz) and the two S-band bands of 2.2GHz-2.4GHz 2.25GHz-2.11GHz.The main polarization gain of the antenna at 1.575GHz 2.05GHz is 5.42dBi-6.3dBi-6.09dBi. the testing performance of the antenna can meet the requirements of GPS navigation applications.The design and simulation process of the antenna is carried out in the full wave electromagnetic simulation software CST. The complete design and analysis process of the antenna is given, which is improved and optimized step by step from the analysis of the most simple microstrip circular polarization antenna.Finally, the better performance is achieved.In order to better understand the working principle of the antenna, the main parameters of the antenna are analyzed by scanning simulation in this paper, and the simulation results are analyzed and summarized.This paper also proposes two novel multi-frequency circularly polarized antennas suitable for handheld terminals. The two antennas have similar structures and are designed in a three-dimensional manner, which effectively reduces the space occupied by the antennas.The simulation and parameter optimization of the antenna are completed in HFSS. The antenna is machined and tested. The test results match well with the theoretical results, and can cover the L1C/A band of GLONASS in the L _ l band of GPS and Galileo.Beidou system. B1 band and GPS L 2 C band.Each test index can meet the requirements of navigation applications.In this paper, the detailed process of antenna design is given, and the principle of circular polarization and dual-frequency of the antenna structure is analyzed.In this paper, the main parameters of antenna structure are scanned in HFSS, and a series of simulation results are compared and analyzed, and the basic law of the influence of each parameter on antenna performance is summarized.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN821.1

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