论文标题
UWB半球形Vivaldi阵列
An UWB Hemispherical Vivaldi Array
论文作者
论文摘要
我们报告了双弯曲表面上的第一个保形超宽带（UWB）阵列，用于广角电子扫描。我们使用四边形网格作为在任意表面上系统地驱动UWB辐射器的基础。开发了由直径为181 mm的半球上排列的52个元素的，由52个元素组成的原型。天线和SMP连接器是由钛打印出的3D，以允许简单制造和组装。我们根据天线大小和元素数来得出半球形阵列的理论增益。测得的原型阵列的实现增益在理论值2-18 GHz的2 dB之内，并且扫描角度从Z轴到120°。该视野是与理论一致的平面阵列的两倍。这项工作为具有更多均匀网格的较大的保形阵列提供了基线性能。此外，基本概念可以扩展到其他UWB辐射元素。
We report the first conformal ultra-wide band (UWB) array on a doubly curved surface for wide angle electronic scanning. We use a quadrilateral mesh as the basis for systematically arraying UWB radiators on arbitrary surfaces. A prototype consisting of a 52 element, dual-polarized Vivaldi array arranged over a 181 mm diameter hemisphere is developed. The antennas and SMP connectors are 3D printed out of titanium to allow for simple fabrication and assembly. We derive the theoretical gain of a hemispherical array based on the antenna size and number of elements. The measured realized gain of the prototype array is within 2 dB of the theoretical value from 2-18 GHz and scan angles out to 120° from the z-axis. This field of view is twice that of a planar array with the same diameter in agreement with theory. This work provides a baseline performance for larger conformal arrays that have more uniform meshes. Furthermore, the basic concept can be extended to other UWB radiating elements.
