Incorporation of the waveguide feed and cavity wall losses into a cartesian/cylindrical hybrid finite-difference time domain analysis of a geometrically-composite microwave applicator
A Surface-Impedance Boundary Condition (SIBC) formulation is combined for the first time with a Cartesian/cylindrical hybrid Finite-Difference Time Domain (FD-TD) algorithm to investigate the effects on the electromagnetic characterization of a geometrically-composite microwave heating applicator introduced by the finite conductivity of the waveguide feed and cavity walls. The computational accuracy of the proposed scheme is validated in terms of the energy balance principle. Computer simulations revealed that the inclusion of wall losses has negligible effects on the interior field distribution and the reflection coefficient, S11. Finally, the formulation developed in this paper can be employed in estimating the wall losses of other microwave-applicator systems with similar surface characteristics.
College of Information Science and Systems Engineering, University of Arkansas, Little Rock, USA.
HM
al-Rizzo
JM
Tranquilla
F
Ma