Title :
VOLMAX: a solid-model-based, transient volumetric Maxwell solver using hybrid grids
Author :
Riley, Douglas J. ; Turner, C.D.
Author_Institution :
Radiat. & Electromagnetic Anal. Dept., Sandia Nat. Labs., Albuquerque, NM, USA
fDate :
2/1/1997 12:00:00 AM
Abstract :
This paper provides an overview of the finite-volume algorithm, the dissipative time-integration scheme, boundary condition implementation, grid generation, and a time-step definition suitable for sub-time cycling. To examine the accuracy of VOLMAX operating in either a purely unstructured or a hybrid-grid mode, the resonances of a rectangular cavity, the input admittance of a “thick” wire antenna, and three simple microstrip applications (microstrip line, patch antenna and low pass filter) with well-known FDTD solutions are examined. The latter three examples demonstrate the accuracy that can be obtained by launching microstrip-guided waves on cubical hexahedral (FDTD) grids and through a dense, unstructured linear tetrahedral region
Keywords :
Maxwell equations; antenna theory; cavity resonators; finite difference time-domain analysis; low-pass filters; microstrip antennas; microstrip filters; microstrip lines; waveguide theory; wire antennas; FDTD; VOLMAX; boundary condition implementation; cubical hexahedral grids; dense unstructured linear tetrahedral region; dissipative time-integration scheme; finite-volume algorithm; grid generation; hybrid grids; input admittance; low pass filter; microstrip applications; microstrip line; microstrip-guided waves; patch antenna; rectangular cavity; resonances; solid-model-based transient volumetric Maxwell solver; sub-time cycling; thick wire antenna; time-step definition; unstructured mode; Admittance; Boundary conditions; Finite difference methods; Mesh generation; Microstrip antennas; Microstrip filters; Patch antennas; Resonance; Time domain analysis; Wire;
Journal_Title :
Antennas and Propagation Magazine, IEEE
