In this letter, we propose a design of a dual circular-polarized antenna for L-band applications (1.1–1.6 GHz). The designed antenna has been developed by considering crossed-dipoles on top of which a circular patch has been placed, to properly act on the mutual coupling between the dipoles. The dual circular polarization is achieved by feeding dipoles in quadrature. Moreover, to increase the antenna gain and polarization purity at high elevation angles, a fence of passive monopoles has been added. The proposed antenna can profitably used as primary feed of a low-frequency parabolic reflector.

中文翻译：

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L波段卫星应用的紧凑型双圆极化天线设计

在这封信中，我们提出了一种用于 L 波段应用 (1.1–1.6 GHz) 的双圆极化天线设计。设计的天线是通过考虑交叉偶极子而开发的，在其顶部放置了圆形贴片，以适当地作用于偶极子之间的相互耦合。双圆极化是通过馈入正交偶极子实现的。此外，为了增加高仰角下的天线增益和极化纯度，增加了无源单极子栅栏。建议的天线可以有利地用作低频抛物面反射器的主馈源。