Numerical simulation of microwave heating by random phase and random frequency microwave power generators

Maxwell's equations combined with heat transport equation have been solved by using FDTD with the leapfrog technique to simulate the microwave heating to water. The temperature distribution of water in the beaker is obtained.The efficiency of microwave heating with random phase and random frequency microwave power generators is studied.The absorbed quantity of heat by water and the temperature rising using the synthesis generators are compared with the results of normal microwave generator. The results show that we can achieve more homogeneous distribution of temperature and higher absorbed quantity of heat by using the synethesis of random phase microwave power generators.But this effect is not significant by using the synthesis of random frequency microwave power generators.