宽波束赋形天线星地测试技术分析与改进

为满足风云三号 G星长寿命、高可靠、业务化的工作要求,星上数传天线采用通信性能好、覆盖率高的宽波束赋形设计。但宽波束赋形天线测试技术相对复杂,对测试质量有潜在影响。文章重点阐述了风云三号 G星数传天线设计方案的必要性,建立星地链路余量分析,对星载数传天线的仿真和试验结果比对进行分析,验证了天线方向图测试结果的有效性,并对星载天线和地面系统的测试技术提出改进,提高了测试结果的准确性和完整性。相应技术的改进可以为平台方案相近的空间辐射测量基准卫星平台系统综合试验验证技术提供支撑。

Analysis and Improvement of Satellite-Ground Testing Technique for Wide Beam Shaped Antenna

In order to meet the requirements of long life, high reliability and service operation of Fengyun-3G satellite, the on-board data transmission antenna adopts a wide beam shape design with good communication performance and high coverage rate. But the test technology of wide beam shaped antenna is relatively complicated, which has potential influ-ence on the test quality. The necessity of the data transmission antenna design of Fengyun-3G satellite is expounded, and the satellite-ground link margin analysis is established. The simulation and test results of satellite-borne data transmission antenna are compared and analyzed, and the validity of the test results of antenna pattern is verified. The improved test technology of satellite-borne antenna and ground system is proposed to improve the accuracy and integrity of the test re-sults. The improvement of the corresponding technology can provide support for the comprehensive test verification tech-nology of the space radiation measurement benchmark satellite platform system with similar platform schemes.