Use of PML boundary conditions for wireless telephone simulations
Cynthia M. Furse, Yan Cui, Gianiuca Lazzi, O.P. Gandhi · Microwave and Optical Technology Letters · 1997
Previous articles on the perfectly matched layer (PML) boundary condition have focused on the reflections from the boundary itself. This article examines an application of the PML boundary condition to determine if it is preferable to use the PML or the more traditional boundary conditions for finite-difference-time-domain (FDTD) simulations of personal wireless telephones. Retarded time and PML boundary conditions are compared in realistic simulations of cellular telephones operating at 835 and 1900 MHz held against the human head. The peak 1-specific absorption rate (SAR) values, total percent power absorbed, impedance, and radiation patterns are compared, and it is shown that the two boundary conditions provide virtually identical results to within 3% for impedance and 1% for other values, and require similar computer resources. This demonstrates that the PML and retarded time boundary conditions are equally accurate for FDTD cellular telephone simulations and can be used with approximately equal efficiency. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 15: 95–98, 1997.