Journal of Microwave Power and Electromagnetic Energy (JMPEE)

 

TITLE

Simulation of Microwave Field and Power Distribution in a Cavity by a Three-Dimensional Finite Element  Method [PDF]

AUTHORS

X. Jia and P. Jolly

1992

27

1

11-22

YEAR

VOLUME

ISSUE

PAGES

 

Abstract

A three-dimensional finite element method is developed to simulate the microwave field structure and power distribution dissipated in the dielectric material in a cavity which may contain lossy, inhomogeneous and isotropic materials of arbitrary shape.  The method was tested first by analysing a simple problem which has an analytical solution. For the material studied in the work with microwaves at a frequency of 2.45 GHz, it was concluded that if the mesh size of the element in the direction of wave propagation is less than 1.5 cm, good agreement can be achieved between the numerical and exact solutions.  Then the microwave power distribution in a multimode rectangular cavity with lossy material is investigated.  The cavity is excited by a rectangular waveguide at the frequency of 2.45 GHz.

 

Key Words:

Microwave heating, Microwave field, Microwave power, Finite element modelling