【摘要】：目前,陣列天線技術(shù)已獲得越來越多的應(yīng)用。然而,在有些場合,平面陣列天線已不能滿足人們對于大范圍掃描特性的要求。共形陣列是一類能夠和載體實現(xiàn)共形的天線陣列,相比平面陣列,能夠獲得更大的波束掃描范圍。同時,對于高速運動的載體,采用共形陣列還能很好的保持載體的空氣動力學(xué)特征。因此,共形陣列技術(shù)已成為了目前研究的一個熱點課題。本文針對柱面和錐臺共形陣列,設(shè)計了矩形微帶貼片單元和Vivaldi天線兩種天線單元。將兩種天線單元進(jìn)行彎曲以實現(xiàn)共形,研究了單元彎曲情況下天線的性能變化。研究表明,若天線單元的尺寸與載體相差較大時,單元彎曲后其整體性能基本保持不變。針對柱面共形陣列,分析了采用Vivaldi天線作為單元時柱面上的直線陣列、弧形陣列以及圓環(huán)陣列的輻射特性。研究表明:Vivaldi天線能夠很好的實現(xiàn)圓柱軸線方向的輻射,但直線陣存在遮擋問題,會導(dǎo)致天線單元駐波特性變差,弧形陣和圓環(huán)陣存在極化相消問題,會導(dǎo)致方向圖在軸線方向產(chǎn)生零陷。論文通過將Vivaldi天線單元進(jìn)行傾斜放置解決了直線陣的遮擋問題,采用相位補償措施解決了弧形陣和圓環(huán)陣的極化相消問題。針對采用Vivaldi天線作為單元的錐臺共形陣列,論文分析了直線陣、弧形陣以及圓環(huán)陣的輻射特性。研究表明,由于錐面具有一定的傾斜特征,錐面上Vivaldi天線單元的駐波特性相對柱面情況更好。論文采用相位補償措施解決了錐面圓環(huán)陣的極化相消問題,并分析了Vivaldi天線圓弧陣的掃描特性。
[Abstract]:At present, array antenna technology has been more and more applied. However, in some cases, planar array antennas can not meet the requirements of large-range scanning characteristics. Conformal array is a kind of antenna array which can realize conformal with carrier. Compared with planar array, conformal array can obtain a larger range of beam scanning. At the same time, the conformal array can keep the aerodynamics of the carrier well. Therefore, conformal array technology has become a hot topic. In this paper, two kinds of antenna elements, rectangular microstrip patch element and Vivaldi antenna, are designed for cylindrical and conical conformal arrays. Two kinds of antenna elements are bent to realize conformal shape, and the antenna performance changes under the condition of element bending are studied. The results show that if the size of antenna element is different from that of the carrier, the overall performance of the element remains basically unchanged after bending. For cylindrical conformal arrays, the radiation characteristics of linear array, arc array and annular array are analyzed when Vivaldi antenna is used as element. The results show that the beam Vivaldi antenna can realize the radiation of the cylindrical axis well, but the linear array has the problem of occlusion, which will lead to the deterioration of the standing wave characteristics of the antenna elements, and the polarization elimination of the arc array and the circular array. This will result in zero trapping in the axis direction of the pattern. In this paper, the problem of linear array occlusion is solved by tilting the Vivaldi antenna elements, and the polarization cancellation problem of arc array and ring array is solved by phase compensation. In this paper, the radiation characteristics of linear array, arc array and circular array are analyzed for conformal array with Vivaldi antenna as element. The results show that the standing wave characteristics of the Vivaldi antenna elements on the cone are better than those of the cylinder due to the inclined characteristics of the cone. In this paper, the phase compensation method is used to solve the polarization cancellation problem of the conical circular array, and the scanning characteristics of the circular array of Vivaldi antenna are analyzed.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN820

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 李文濤;超寬帶天線設(shè)計及共形陣列綜合研究[D];西安電子科技大學(xué);2010年

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本文編號：2142948