【摘要】：毫米波柱透鏡天線是一種高方向性的口徑天線,具有大角度范圍的多波束掃描及低損耗等優(yōu)點(diǎn),廣泛應(yīng)用于導(dǎo)航、衛(wèi)星通信等領(lǐng)域中。本文提出的兩種以基本饋電單元布置而成的圓弧形饋電陣列實(shí)現(xiàn)毫米波大角度多波束掃描介質(zhì)柱透鏡天線,可以在毫米波段實(shí)現(xiàn)低損耗、高增益和高效率的電子掃描天線需要。具體的研究工作如下:首先論述了介質(zhì)柱透鏡天線的基本理論及分析方法。研究了兩種不同形式的饋源:平面八木天線、直線漸變縫隙天線(LTSA),在透鏡天線系統(tǒng)中,選取LTSA作為饋源,因其能夠有效控制波束寬度,且有利于電路與天線的集成。其次采用射線追蹤法分析水平極化介質(zhì)柱透鏡天線的聚焦特性,采用電磁軟件HFSS分別研究饋源的照射位置、柱透鏡的半徑、饋源的波束寬度以及波導(dǎo)間距等對(duì)水平極化柱透鏡天線輻射性能的影響。在此基礎(chǔ)上,研究了LTSA作為垂直極化饋源的單波束垂直極化柱透鏡天線的性能,提出了展寬俯仰面波束寬度及消除方向圖毛刺的方法,分析了介質(zhì)柱材料的損耗正切對(duì)增益的影響。本文設(shè)計(jì)了兩種極化方式的介質(zhì)柱透鏡天線可以滿足一定的輻射特性,分析了各自實(shí)現(xiàn)多波束掃描時(shí)饋源間的互耦特性,確定滿足多波束掃描時(shí)饋源間合適的間距。
[Abstract]:Millimeter wave cylindrical lens antenna is a kind of high directional aperture antenna, which has the advantages of multi-beam scanning and low loss in a wide angle range. It is widely used in navigation, satellite communication and other fields. In this paper, two kinds of circular arc feed arrays based on basic feed units are proposed to realize millimeter wave large angle multi-beam scanning dielectric cylindrical lens antenna, which can realize low loss, high gain and high efficiency electronic scanning antenna in millimeter band. The specific research work is as follows: firstly, the basic theory and analysis method of dielectric cylindrical lens antenna are discussed. Two different forms of feed: plane eight wood antenna and linear gradual slot antenna (LTSA), are studied in the lens antenna system. LTSA is selected as the feed because it can effectively control the beam width and is beneficial to the integration of circuit and antenna. Secondly, the focusing characteristics of the horizontally polarized dielectric cylindrical lens antenna are analyzed by ray tracing method, and the irradiation position of the feed and the radius of the cylindrical lens are studied by using the electromagnetic software HFSS. The effects of beam width and waveguide spacing on the radiation performance of horizontal polarization cylindrical lens antenna. On this basis, the performance of single beam vertical polarization cylindrical lens antenna with LTSA as vertical polarization feed is studied, and the method of broadening the beam width of pitch surface and eliminating the burr of pattern is proposed. The influence of loss tangent on gain of dielectric column material is analyzed. In this paper, two polarization dielectric cylindrical lens antennas are designed to meet certain radiation characteristics, the mutual coupling characteristics between feed sources are analyzed when multi-beam scanning is realized, and the suitable spacing between feed sources is determined when multi-beam scanning is satisfied.
【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)】：TN820

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 吳文濤;Ka波段功率合成放大技術(shù)研究[D];浙江大學(xué);2007年

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本文編號(hào)：2480253