Passive millimeter wave radiometric measurement of metal solid objects

On basis of analyzing the antenna temperature contrast of metal solid objects, the passive millimeter wave radiometric measurement was presented for concealed body technology. In the experiment the metal solid object was under the condition of naked and covered with weft by a 94 GHz dicke-type radiometer. The sky temperature was also given by the former measurement. The results show the antenna temperature contrast of the metal solid object has great changes under the two different conditions and the passive millimeter concealed body technology is really to reduce the contrast of the antenna temperature of objects and background.