首页>
外国专利>
Low backlobe variable pitch quadrifilar helix antenna system for mobile satellite applications
Low backlobe variable pitch quadrifilar helix antenna system for mobile satellite applications
展开▼
机译:用于移动卫星应用的低后瓣可变螺距四线螺旋天线系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
A quadrifilar helix antenna system that is wound with a helical structure that changes pitch towards top of the antenna. An exemplary antenna system has first and second bifilar helical loops that each comprise a pair of orthogonal windings disposed around a common central axis. Each loop has a winding pitch that varies along the axis to achieve backlobe radiation suppression from the antenna system. First and second terminals are coupled to respective top ends of the bifilar helical loops. The terminals may be fed in phase quadrature by a quadrature hybrid. The antenna system may also include short circuit coupled to respective bottom ends the first and second bifilar helical loops. The antenna system is preferably used in vehicle-to-satellite mobile communication applications.
展开▼