Study Of The Thermal Characteristics Of Broadband National Power Standard

At present, the thermal effect of the RF power is used mainly to measure the temperature change of the load after absorbing the RF power or the microwave power in the RF power standard. Then, use the temperature change to get the measured power. With the development of contemporary science, heat transfer becomes more and more useful for almost every domain. Because the temperature change of the power standard after absorbing RF power or the microwave power will affect the work of the power standard, it is necessary to use the theories of heat transfer to analyze the thermal characteristics. Then, a steady system will be formed.At first, the computational model of power standard and load are formed by ANSYS software and different examinations are simulated using different boundary condition and heat source. Then, the mathematical model of the power standard is formed in this thesis. The influence of the environmental temperature change and the distribution of the heat flow in two directions are analyzed using the lumped parameter method. These will provide the theoretical basis to design the power standard. At last, the process of multi-field simulation is studied. And the examinations of the load and heat insulation are simulated using the method of multi-field simulation. The electromagnetic field is combined with the temperature field during these analyses and it is much closer to the actual situation and improves the simulation accuracy.