寬波束圓極化微帶天線的研究與設(shè)計
發(fā)布時間：2018-07-20 12:10
【摘要】：隨著衛(wèi)星通信和移動通信的快速發(fā)展,天線作為通信系統(tǒng)的重要組成部分,其性能優(yōu)劣直接關(guān)乎整個系統(tǒng)的質(zhì)量,所以對天線輻射特性提出了更高的要求。由于圓極化天線對左右旋極化波彼此隔離,互不接收,即旋向正交性,且入射到對稱目標(biāo)時旋向會發(fā)生逆轉(zhuǎn),所以具有較弱的多徑效應(yīng)和較強的抑制雨霧干擾等特性,故而在衛(wèi)星導(dǎo)航定位系統(tǒng)中一般采用圓極化波作為衛(wèi)星導(dǎo)航信號。而且為了盡可能多的接收衛(wèi)星信號并且獲得較好的信噪比,衛(wèi)星導(dǎo)航定位系統(tǒng)要求天線不僅具有寬角圓極化覆蓋,還必須有較高的低仰角增益和較寬的波束寬度。本文主要針對寬波束圓極化微帶天線展開了研究分析,首先簡述了選題的背景和意義以及國內(nèi)外研究現(xiàn)狀,總結(jié)了展寬波瓣寬度的幾種方法。重點分析了圓極化波的產(chǎn)生條件和合成方法,經(jīng)過單饋法原理分析和三維電磁仿真軟件HFSS仿真計算,設(shè)計一款結(jié)構(gòu)簡單、圓極化性能良好的寬角圓極化微帶天線并加工了實物。研究表明,在GPS工作頻段內(nèi)軸比小于2dB,且在兩個主平面內(nèi)3dB軸比波束幾乎覆蓋上半空間,半功率波束寬度為98°,滿足設(shè)計指標(biāo)的要求。本文分析了波束寬度的影響因素,研究了目前展寬波瓣寬度的方法,通過原理分析和軟件仿真計算,設(shè)計了兩款波束較寬的天線。加載金屬方環(huán)的雙層天線利用主輻射單元垂直輻射最強和寄生環(huán)水平輻射較強的特點,有效地展寬3dB波束寬度。優(yōu)化設(shè)計表明,該天線在兩個主平面內(nèi)的3dB波束范圍均大于140°,且波束覆蓋空間內(nèi)軸比小于3dB,最大增益為-0.9dB。加載金屬柱的天線通過輻射貼片與金屬柱之間的電磁耦合使天線的3dB波瓣寬度增大到140°,且波束范圍內(nèi)軸比小于2dB。同時通過金屬柱頂端加載圓盤使天線剖面得到了有效降低,最大增益為3.2dB,10°仰角處的平均增益大于-0.5dB。
[Abstract]:With the rapid development of satellite communication and mobile communication, antenna is an important part of communication system, and its performance is directly related to the quality of the whole system. Because the circular polarization antenna isolates the left and right spin polarization waves from each other and does not receive each other, that is, the rotation orthogonality, and when incident to the symmetrical target, the rotation direction will be reversed, so it has the characteristics of weak multipath effect and strong suppression of rain and fog interference, etc. Therefore, circular polarization wave is generally used as satellite navigation signal in satellite navigation and positioning system. In order to receive as many satellite signals as possible and obtain better signal-to-noise ratio (SNR), the satellite navigation and positioning system requires the antenna not only to have wide-angle circular polarization coverage, but also to have higher low-elevation gain and wider beam width. This paper mainly focuses on the research and analysis of wide-beam circularly polarized microstrip antenna. Firstly, the background and significance of the selected topic and the research status at home and abroad are briefly described, and several methods of broadening the width of the lobe are summarized. The generation condition and synthesis method of circular polarization wave are analyzed in detail. Through the principle analysis of single feed method and the simulation calculation of 3D electromagnetic simulation software HFSS, a wide circular polarized microstrip antenna with simple structure and good circular polarization performance is designed and processed. The results show that the axial ratio is less than 2 dB in the operating frequency band of GPS, and the 3dB axial ratio beam almost covers the upper half space and the width of the half power beam is 98 擄in the two main planes, which meets the requirements of the design index. In this paper, the influence factors of beamwidth are analyzed, and the methods of broadening lobe width are studied. Through principle analysis and software simulation, two antennas with wide beam width are designed. The double layer antenna loaded with metal square ring can effectively widen the 3dB beam width by taking advantage of the strong vertical radiation of the main radiation unit and the strong horizontal radiation of the parasitic ring. The optimized design shows that the 3dB beam range of the antenna is more than 140 擄in the two main planes, and the axial ratio in the coverage space is less than 3 dB, and the maximum gain is -0.9 dB. The antenna loaded with metal column increases the width of 3dB lobe to 140 擄by electromagnetic coupling between the radiation patch and the metal column, and the axial ratio within the beam range is less than 2 dB. At the same time, the antenna profile is reduced effectively by loading the disk at the top of the metal column, and the average gain at 10 擄elevation angle of 3.2 dB is greater than -0.5 dB.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN822
本文編號：2133471
[Abstract]:With the rapid development of satellite communication and mobile communication, antenna is an important part of communication system, and its performance is directly related to the quality of the whole system. Because the circular polarization antenna isolates the left and right spin polarization waves from each other and does not receive each other, that is, the rotation orthogonality, and when incident to the symmetrical target, the rotation direction will be reversed, so it has the characteristics of weak multipath effect and strong suppression of rain and fog interference, etc. Therefore, circular polarization wave is generally used as satellite navigation signal in satellite navigation and positioning system. In order to receive as many satellite signals as possible and obtain better signal-to-noise ratio (SNR), the satellite navigation and positioning system requires the antenna not only to have wide-angle circular polarization coverage, but also to have higher low-elevation gain and wider beam width. This paper mainly focuses on the research and analysis of wide-beam circularly polarized microstrip antenna. Firstly, the background and significance of the selected topic and the research status at home and abroad are briefly described, and several methods of broadening the width of the lobe are summarized. The generation condition and synthesis method of circular polarization wave are analyzed in detail. Through the principle analysis of single feed method and the simulation calculation of 3D electromagnetic simulation software HFSS, a wide circular polarized microstrip antenna with simple structure and good circular polarization performance is designed and processed. The results show that the axial ratio is less than 2 dB in the operating frequency band of GPS, and the 3dB axial ratio beam almost covers the upper half space and the width of the half power beam is 98 擄in the two main planes, which meets the requirements of the design index. In this paper, the influence factors of beamwidth are analyzed, and the methods of broadening lobe width are studied. Through principle analysis and software simulation, two antennas with wide beam width are designed. The double layer antenna loaded with metal square ring can effectively widen the 3dB beam width by taking advantage of the strong vertical radiation of the main radiation unit and the strong horizontal radiation of the parasitic ring. The optimized design shows that the 3dB beam range of the antenna is more than 140 擄in the two main planes, and the axial ratio in the coverage space is less than 3 dB, and the maximum gain is -0.9 dB. The antenna loaded with metal column increases the width of 3dB lobe to 140 擄by electromagnetic coupling between the radiation patch and the metal column, and the axial ratio within the beam range is less than 2 dB. At the same time, the antenna profile is reduced effectively by loading the disk at the top of the metal column, and the average gain at 10 擄elevation angle of 3.2 dB is greater than -0.5 dB.
【學(xué)位授予單位】：南京郵電大學(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)期刊論文 前1條
1 毛文輝;朱旗;王少永;徐善駕;;寬波束柱面共形毫米波微帶天線設(shè)計[J];電波科學(xué)學(xué)報;2008年02期
相關(guān)碩士學(xué)位論文 前4條
1 談田爽;多頻點寬波束圓極化GPS/北斗微帶天線研究[D];中國科學(xué)技術(shù)大學(xué);2015年
2 牛艷娟;GPS寬波束圓極化微帶天線單元及陣列天線研究[D];鄭州輕工業(yè)學(xué)院;2011年
3 王義春;毫米波錐形相控陣波束控制系統(tǒng)設(shè)計[D];中國科學(xué)技術(shù)大學(xué);2010年
4 高陽;全球定位系統(tǒng)中的小型介質(zhì)加載四臂螺旋天線[D];浙江大學(xué);2008年
，本文編號：2133471
本文鏈接：http://sikaile.net/kejilunwen/xinxigongchenglunwen/2133471.html
最近更新
教材專著
