Temperature is an important parameter for industrial process control. With
the usual methods we obtain only an invasive or superficial information about
temperature. Microwave radiometry is a non-invasive way to determine the temperature
within dissipative body. This paper presents the design of a new radiometer. With this
system, the radiometric temperature is independent of the reflection coefficient of the
sensor. A simplified calibration takes into account insertion losses of the microwave
elements and the frequency bandwidth has been greatly reduced to eliminate the
unwanted electromagnetic noise.