【摘 要】
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本文根据仙后座A、金牛座A和天鹅座A等宇宙射电源的亮度温度T_B等强度曲线算出了它们各自的角扩展修正因子。对这些源的流量也根据已发表的资料作了检验。用这三个源测量了几
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本文根据仙后座A、金牛座A和天鹅座A等宇宙射电源的亮度温度T_B等强度曲线算出了它们各自的角扩展修正因子。对这些源的流量也根据已发表的资料作了检验。用这三个源测量了几个口径大小不同的天线,并用新得到的上述三个源的参数确定了天线的增益。其结果表明:在4千兆赫和6千兆赫两个波段上,大型天线增益的测量精度都优于±0.45分贝(3σ)。
In this paper, according to the intensity curves of Cassiopeia A, Taurus A and Cygnus A, such as the brightness temperature T_B, the respective angular expansion correction factors are calculated. The flow of these sources was also tested on the basis of published information. Several antennas with different aperture sizes were measured with these three sources and the gain of the antenna was determined using the newly obtained parameters of the above three sources. The results show that the gain measurements of large antennas are better than ± 0.45 dB (3σ) at both the 4 GHz and 6 GHz bands.
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