《Tab.1 Measured noise figures and gains of the cryogen-ic front end at 77K in the pass band表1 77K温度下

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《基于L波段微波低温辐射计的海水表面盐度检测研究（英文）》

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Table 2 lists the performances of different cryogenic front ends with similar operating frequencies.The application of cryogenic front end in radiometers is not popular，and the listed front ends are applied in either communications[12]or radar[13]systems.It is seen that the proposed cryogenic front end has a higher gain and a lower equivalent noise temperature.