We know it is important to im- pose that E x = E y = 0 on the other end (z = 0,d). We begin with the general TE and TM waveguide fields, which satisfy the boundary conditions on the side of walls (x = 0,a and y = 0,b) of the cavity. The geometry of rectangular cavity (figure 2.1) is such that it consists of a length which is shorted at both ends (z = 0). The two things which are important to derive are the equation for resonant frequen- cies (TE mnl and TM mnl ) and the quality factor. Coupling to the resonator is done by a small aperture or small probe. Electric and magnetic energy is stored in the cavity while power is dissipated in the metallic walls of the cavity and in dielectric filling the cavity. The waveguide resonators are short circuit- ed at both ends to prevent radiations and known as closed box or cavity. He waveguides are used as a type of transmission lines, therefore resonators can also be built from closed sections of waveguide. Index Terms - Microwave Oven, Eigenvalues, COMSOL Multiphysics, Quality factor. In addition, the same values and plots are obtained for a microwave with 1 liter of water load. It was observed that quality factor drops with the increase in the number of hotspots. The geometrical model of microwave oven is then used to find the resonant frequency and quality factor along with the plots for each eigenvalue. Sarhad University of Science and Information Technology, Pakistan.Ībstract - In this research, we have used COMSOL Multiphysics to model the Microwave oven. Hussnain Haider, Muhammad Faheem Siddique, Syed Haider Abbas, Awais Ahmed International Journal of Scientific & Engineering Research, Volume 4, Issue 9, September-2013 2473
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