In response to the demand for high-precision noise transmission in millimeter and submillimeter waves,a high-tem-perature noise source applied in THz frequency band using microwave radiator is introduced,which can provide an equivalent out-put noise temperature of about 500 K with an uncertainty of less than 2％.The radiator is made of pyramid-shaped high-temperature absorbing material,with good homogeneity for both E and H surfaces.The constant temperature bath heating method effectively im-proves the temperature uniformity of the radiator.An improved rectangular horn antenna is used to reduce the port reflection and thus reduce the effect of the antenna on the equivalent output noise temperature.
high temperature noise sourceequivalent output noise temperatureradiator
万方数据
维普
