日本未来的直播卫星要求星载天线有精确的赋形波束。采用单赋形反射面天线是合适的,因为它不需要复杂的馈电网络。然而在过去的研究中,反射面上出现有不连续性。在本文中,不连续性问题得到克服,分别在上下行频段上成功地设计出形成赋形波束可覆盖日本诸岛的赋形反射面。加工了下行天线,辐射图得到测试结果验证。辐射图满足对星载天线的无线电规定,诸如旁瓣特性和交叉极化特性。 Future direct broadcast satellites in Japan require that spaceborne antennas have an accurate shaped beam. The use of a single specular reflector antenna is suitable because it does not require a complex feed network. However, in the past studies, discontinuities appeared on the reflecting surface. In this paper, the problem of discontinuity was overcome, and the shaped reflecting surface forming the shaped beam covering the Japanese islands was successfully designed in the uplink and downlink frequency bands respectively. Processing down the antenna, the radiation pattern is verified by the test results. The radiation pattern satisfies the radio regulations for spaceborne antennas, such as side lobe characteristics and cross-polarization characteristics.