基于微带天线的球面共形阵设计与研究
发布时间：2018-09-18 17:16
【摘要】：本文研究球面共形阵天线的特性。首先设计了一种双层双馈点圆极化微带天线作为天线阵元;接着基于该微带天线探讨了阵中方向图及平面相控阵扫描特性。为研究共形阵特性,文章对球面阵元耦合进行了仿真,并在此基础上研究共形阵扫描特性。。为展宽频带,在单层贴片上增加寄生贴片得到双层双馈点圆极化微带天线。该天线在频带内阻抗特性符合要求,增益达到了9.7dB。以该天线为阵元,借助HFSS得到方形阵和簇形阵的阵中方向图,再对两种平面阵列进行了扫描特性研究。结果表明相近阵元数目的簇形平面阵有更大的扫描范围,方形阵在扫描俯仰角小于60o时已失去扫描能力。共形阵研究始于球面阵元耦合,文中探讨了阵元间距对两阵元端口S参数的影响。在此基础上对比了等角度排布和等间距排布共形阵,在扫描范围内等间距排布方式具有更稳定的增益。
[Abstract]:The characteristics of spherical conformal array antenna are studied in this paper. Firstly, a double-layer doubly fed point circularly polarized microstrip antenna is designed as the antenna element, and then the scanning characteristics of the planar phased array and the plane phased array are discussed based on the microstrip antenna. In order to study the characteristics of conformal array, the coupling of spherical array elements is simulated, and the scanning characteristics of conformal array are studied. In order to widen the frequency band, a double-layer doubly fed point circularly polarized microstrip antenna is obtained by adding parasitic patch to a single-layer patch. The impedance characteristics of the antenna meet the requirements in the frequency band, and the gain is up to 9.7 dB. Taking the antenna as the element, the square and cluster array directions of the square array and the cluster array are obtained by means of HFSS, and the scanning characteristics of the two kinds of planar arrays are studied. The results show that the cluster plane array with similar number of elements has a larger scanning range, and the square array has lost the scanning ability when the scan pitch angle is less than 60 o. The study of conformal array begins with the coupling of spherical array elements. The effect of array element spacing on the S parameters of two array elements is discussed in this paper. On the basis of this, the conformal array with equal angle and equal spacing is compared, and the equal spacing arrangement has a more stable gain in the scanning range.
【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】：2015
【分类号】：TN822
本文编号：2248589
[Abstract]:The characteristics of spherical conformal array antenna are studied in this paper. Firstly, a double-layer doubly fed point circularly polarized microstrip antenna is designed as the antenna element, and then the scanning characteristics of the planar phased array and the plane phased array are discussed based on the microstrip antenna. In order to study the characteristics of conformal array, the coupling of spherical array elements is simulated, and the scanning characteristics of conformal array are studied. In order to widen the frequency band, a double-layer doubly fed point circularly polarized microstrip antenna is obtained by adding parasitic patch to a single-layer patch. The impedance characteristics of the antenna meet the requirements in the frequency band, and the gain is up to 9.7 dB. Taking the antenna as the element, the square and cluster array directions of the square array and the cluster array are obtained by means of HFSS, and the scanning characteristics of the two kinds of planar arrays are studied. The results show that the cluster plane array with similar number of elements has a larger scanning range, and the square array has lost the scanning ability when the scan pitch angle is less than 60 o. The study of conformal array begins with the coupling of spherical array elements. The effect of array element spacing on the S parameters of two array elements is discussed in this paper. On the basis of this, the conformal array with equal angle and equal spacing is compared, and the equal spacing arrangement has a more stable gain in the scanning range.
【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】：2015
【分类号】：TN822
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