Design and Experimental Results of a Spherical Antenna Array for a Conformal Array Demonstrator
Design and Experimental Results of a Spherical Antenna Array for a Conformal Array Demonstrator
复制标题
共形阵列演示器球形天线阵列的设计和实验结果
DOI：
--
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
P. Knott
中科院分区：
文献类型：
--
作者：
P. Knott
安装在现代飞机、车辆或船舶部件上的非平面表面上的共形天线阵列被认为是许多应用的有吸引力的替代方案，而平面阵列或反射器天线具有明确的缺点。一些潜在的优势是改进的空气动力学，增加有效载荷，大视场（LFOV）和低可观测性（LO）。然而，共形阵列技术在商业应用中的使用仍然是非常罕见的。弯曲孔径上的天线阵列的最新示例通常是圆柱形的，但仅表现出弱的曲率。本文介绍了一个球形天线阵的发展与95 × 3天线单元，直径为300毫米，开口角为112度。由于高方向性和二维波束控制所需的平面或弯曲天线孔径上的天线元件的数量可以容易地变得非常大，特别是如果需要大约一半自由空间波长的元件间隔，则天线元件被布置在子阵列中，每个天线在公共基板上承载中心频率为f = 9.5GHz的3个圆极化贴片天线和相位校正的馈电网络。该子阵列适合于容易地集成到具有双弯曲孔径的天线阵列中，并且可以被视为天线增益与波束粒度之间的权衡。天线匹配和辐射的远场模式，以及测量波束形成结果的实验结果将被提交。
Conformal antenna arrays fitted to non-planar surfaces on parts of modern aircrafts, vehicles or ships are considered an attractive alternative for many applications whereas planar arrays or reflector antennas have definite drawbacks. Some of the potential advantages are improved aerodynamics, increased payload, large field of view (LFOV) and low observability (LO). However, the usage of conformal array technology in commercial applications is still comparably rare. Recent examples of antenna arrays on curved apertures are typically of cylindrical shape but only exhibit a weak degree of curvature. The present paper describes the development of a spherical antenna array with 95x3 antenna elements, a diameter of 300 mm and an opening angle of 112deg . Since the number of antenna elements on a planar or curved antenna aperture required for high directivity and two-dimensional beam steering can easily become very large, especially if an element spacing around half the free space wave length is required, the antenna elements are arranged in sub-arrays, each carrying 3 circularly polarized patch antennas at a centre frequency of f = 9.5 GHz and a phase corrected feed network on a common substrate. The sub-array is suited for easy integration into antenna arrays with double curved aperture and can be seen as a trade-off between antenna gain vs. beam granularity. Experimental results on antenna matching and radiated far field patterns as well as measured beam forming results will be presented.