QuickWave
Version Copernicus 96
a general purpose electromagnetic simulator
based on the finite-difference time-domain method
with new models and procedures
Preliminary version of the software
developed between April 1994 and September 1996
with support of the Commision of the European Communities.
Contract Copernicus 93:7565
in cooperation with Warsaw University of
Technology, Warsaw, Poland
For more information mail to : gwarek@ire.pw.edu.pl
Authors:
Wojciech Gwarek
Malgorzata Celuch-Marcysiak
Andrzej Kozak
Maciej Sypniewski
Andrzej Wieckowski
With participation of:
Tomasz Kucharski, Cezary Mroczkowski, Jaroslaw Niewczas,
Karol Pawlak, Mariusz Walczuk.
Innovative
features of QW-FDTD method:
1. Local integral approximations
for irregular geometries:
- polygonal cells at curved metal surfaces,
- inhomogeneous cells at media interfaces,
- graded mesh with distinguished planes.
2. Pure mode excitation with modal
templates:
- template extraction by 2D dynamic or quasistatic solvers,
- application of both field and impedance template.
3. A new system of S-parameter extraction:
- differential method,
- compensation for imperfect absorbing boundaries,
- template filtering.
4. Generation of unperturbed eigenmodes:
- a variable source impedance method.
5. Superabsorption + NTF for antenna
problems.
6. Stable interface to nonlinear
lumped elements.
Special
features of QuickWave program:
1. Object-oriented
C++ code
2. Multiplatform
performance:
- design using zApp TM software of RogueWave, Inc., libraries
for Windows, Unix,...
3. Possibility
of circuit segmentation into subcircuits:
- parallel computations on subcircuits
4. Main
functional blocks of QuickWave:
- graphical editor
- automatic mesh generator
- geometry compiler
- FDTD field simulation kernel
- postprocessing modules
- real time interactive display of the results.
Scope
of applications:
1. Types of structures:
- irregularly shaped,
- inhomogeneous,
- anisotropic (diagonal tensors),
- lossy (sigma,magnetic sigma = consts.),
- shielded or open,
- nonlinear elements.
2. Categories of problems:
- resonators: eigenfrequencies and eigenmodes,
- S-parameters of circuit components: couplers, filters,
junctions, matching circuits,
- antennas: radiation characteristics and return loss.
Versions
of QuickWave:
- for Windows32,
- for Windows'95
- for UNIX X/Motif (SUN,HP,SGI,IBM6000)
- for OS2
- mute version
- tasker control
- parallel
Planned
extensions:
extended range of nonlinear components,
hybrid techniques:
- interface to eigenfunction expansion in time,
- interface to circuit simulators (SPICE, GASSIM),
- interface to 2D simulations
postprocessing by a modified Prony method,
improved models of thin metal sheets and wires,
incorporation of optimizing procedures