柱面与锥台共形阵列的研究
发布时间：2018-07-25 06:35
【摘要】：目前,阵列天线技术已获得越来越多的应用。然而,在有些场合,平面阵列天线已不能满足人们对于大范围扫描特性的要求。共形阵列是一类能够和载体实现共形的天线阵列,相比平面阵列,能够获得更大的波束扫描范围。同时,对于高速运动的载体,采用共形阵列还能很好的保持载体的空气动力学特征。因此,共形阵列技术已成为了目前研究的一个热点课题。本文针对柱面和锥台共形阵列,设计了矩形微带贴片单元和Vivaldi天线两种天线单元。将两种天线单元进行弯曲以实现共形,研究了单元弯曲情况下天线的性能变化。研究表明,若天线单元的尺寸与载体相差较大时,单元弯曲后其整体性能基本保持不变。针对柱面共形阵列,分析了采用Vivaldi天线作为单元时柱面上的直线阵列、弧形阵列以及圆环阵列的辐射特性。研究表明:Vivaldi天线能够很好的实现圆柱轴线方向的辐射,但直线阵存在遮挡问题,会导致天线单元驻波特性变差,弧形阵和圆环阵存在极化相消问题,会导致方向图在轴线方向产生零陷。论文通过将Vivaldi天线单元进行倾斜放置解决了直线阵的遮挡问题,采用相位补偿措施解决了弧形阵和圆环阵的极化相消问题。针对采用Vivaldi天线作为单元的锥台共形阵列,论文分析了直线阵、弧形阵以及圆环阵的辐射特性。研究表明,由于锥面具有一定的倾斜特征,锥面上Vivaldi天线单元的驻波特性相对柱面情况更好。论文采用相位补偿措施解决了锥面圆环阵的极化相消问题,并分析了Vivaldi天线圆弧阵的扫描特性。
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN820
本文编号：2142948
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN820
【参考文献】
相关博士学位论文 前1条
1 李文涛;超宽带天线设计及共形阵列综合研究[D];西安电子科技大学;2010年
，本文编号：2142948
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