本文選題：共口徑 + 圓極化��； 參考：《南京理工大學》2014年碩士論文

【摘要】：波導縫隙天線由于其自身所具有的高增益、高效率、結構緊湊等優(yōu)點,廣泛應用于雷達系統(tǒng)、地面接收基站、衛(wèi)星通信等諸多領域。在天線的應用當中,極化方式尤為重要,本文主要針對波導縫隙天線如何實現(xiàn)圓極化設計進行了研究,研究內容主要包括： 1.詳細闡述波導縫隙天線的設計原理的基礎上,針對共口徑雙圓極化天線應用,提出了兩種圓極化波導縫隙天線設計方案：波導縫隙加載波導圓極化器的圓極化脊波導縫隙天線和波導縫隙加載微帶的圓極化波導縫隙天線。 2.對圓極化脊波導縫隙天線進行研究。這種天線在饋電波導寬邊開縱縫的基礎上,附加極化波導實現(xiàn)圓極化輻射單元,同時饋電波導與極化波導均采用脊波導以減小尺寸。對單元的輻射特性進行了深入分析,在此基礎上設計了工作于10GHz的1×10圓極化波導縫隙陣列天線。中心頻率上天線增益為17dB,副瓣電平為-25dB,3dB軸比帶寬為3.3%。該天線具有良好的軸比帶寬、易于實現(xiàn)幅度控制而且尺寸小,適合于實現(xiàn)高性能的雙極化共口徑天線。 3.提出波導縫隙加載微帶的圓極化天線單元方案。在一般波導縫隙寬邊上方附加微帶貼片天線,縫隙從饋電波導耦合能量至上方的微帶貼片,由設計靈活的微帶貼片實現(xiàn)圓極化輻射。對圓極化單元進行了詳細的參數(shù)仿真分析,驗證了設計的合理性,并提出加載二元貼片的方案改進單元的輻射效率。該天線結合了波導縫隙天線高效率和微帶貼片設計靈活、易加工等優(yōu)點,具有良好前景。
[Abstract]:Waveguide slot antenna is widely used in radar system, ground receiving base station, satellite communication and so on because of its high gain, high efficiency and compact structure.In the application of antenna, polarization mode is very important. In this paper, the design of circular polarization of waveguide slot antenna is studied. The main contents are as follows:1.Based on the design principle of waveguide slot antenna, the application of common-aperture dual-circularly polarized antenna is discussed in detail.Two design schemes of circularly polarized waveguide slot antenna are presented: the circular polarized ridge waveguide slot antenna loaded with waveguide slot and the circular polarization waveguide slot antenna loaded with microstrip.2.The slot antenna of circular polarized ridge waveguide is studied.On the basis of the longitudinal slit of the wide edge of the feed waveguide, the circular polarized radiation unit is realized by adding the polarized waveguide, and the ridge waveguide is used to reduce the size of the feed waveguide and the polarized waveguide.Based on the analysis of the radiation characteristics of the element, a 1 脳 10 circularly polarized waveguide slot array antenna working in 10GHz is designed.At the center frequency, the antenna gain is 17 dB, and the sidelobe level is -25 dB ~ 3 dB.The antenna has good axial ratio bandwidth, easy to realize amplitude control and small size, which is suitable for high performance dual-polarization common aperture antenna.3.A circular polarization antenna element scheme with waveguide slot loaded microstrip is proposed.The microstrip patch antenna is added over the wide edge of the general waveguide slot. The gap coupling energy from the feed waveguide to the upper microstrip patch is applied to realize circular polarization radiation by the flexible microstrip patch.Detailed parameter simulation analysis of circular polarization cell is carried out, which verifies the rationality of the design, and proposes a scheme to improve the radiation efficiency of the cell by loading binary patch.The antenna combines the high efficiency of waveguide slot antenna and the advantages of flexible design and easy processing of microstrip patch, so it has a good prospect.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN823.24

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