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参照反射面天线主波束效率估计的简易计算公式,对“神舟四号”(SZ-4)飞船辐射计天线的主波束效率进行了具体估算,给出了计算流程和计算结果.计算表明,该辐射计天线在6.6 GHz,19.35 GHz,23.8 GHz和37 GHz 4个频段上的波束效率分别为89％,91.24％,92.91％和94.87％,并经过了在轨飞行验证.
With reference to the simplified calculation formula of the main beam efficiency of the reflector antenna, the main beam efficiency of the SZ-4 spacecraft radiometer antenna is estimated and the calculation flow and calculation results are given. Beam efficiencies of the radiometer antenna at 89 GHz, 91.24%, 92.91% and 94.87% at 6.6 GHz, 19.35 GHz, 23.8 GHz and 37 GHz, respectively, have been validated in orbit.