Low-profile single-feed circularly-polarized wide-beam-forming spaceborne antenna and satellite

The invention aims to provide a low-profile single-feed circularly-polarized wide-beam-forming spaceborne antenna and a satellite. The spaceborne antenna comprises a bottom plate, a high-frequency dielectric plate, a radiation patch and a first metal branch knot. The radiation patch comprises a central patch and a peripheral patch, the peripheral patch is arranged at the periphery of the central patch in a surrounding manner, a first gap is formed between the central patch and the peripheral patch, the peripheral patch is divided by at least six second gaps, the width of the first gap is 0.5-1mm, and the width of the second gap is 0.5-1mm. The width of the second gap ranges from 0.2 mm to 0.5 mm. The satellite-borne antenna has the advantages of being extremely low in profile, simple in feed and capable of achieving wide beam forming. 本发明的目的在于提供一种低剖面单馈圆极化宽波束赋形星载天线以及卫星，星载天线包括底板、高频介质板、辐射贴片以及第一金属枝节。辐射贴片包括中心贴片以及外围贴片，外围贴片环绕设置于所述中心贴片外周，所述中心贴片与所述外围贴片之间形成有第一缝隙，所述外围贴片由至少六条第二缝隙分割，其中，所述第一缝隙的宽度为0.5毫米至1毫米，所述第二缝隙的宽度为0.2毫米至