 |
|
EMA3D Features
EMA3D
Premier 3D Electromagnetic Simulation
EMA3D is a powerful 3D numerical solution of Maxwell’s curl
equations based on the time-domain finite-difference method in
rectangular coordinates. It has application to nearly any EM
coupling, radiating or interaction problem. Typical applications
include:
-
EMI/EMC interaction
-
High Intensity Radiated Fields (HIRF)
-
Lightning interaction
-
Antenna analysis
-
Shielding calculations
-
Coupling to aircraft
-
Printed circuit board EMC
-
High power microwave
-
Biomedical electromagnetics
-
Nuclear Electromagnetic Pulse
-
Microwave/millimeter wave
-
Multi port network analysis
-
Monolithic integrated circuit (MMIC) design and
analysis
-
Wideband or pulsed CW RCS
Basic capabilities and features of EMA3D version 3
-
Perfect electric conductors
-
Lossless or lossy dielectric media (electromagnetic parameters
can be
specified)
-
Thin wires (resistive loads and resistance per unit
length)
-
Thin gaps
-
Frequency dependent surface and transfer impedances of lossy
surfaces (e.g., carbon fiber materials)
-
Time varying air conductivity
-
Caused by air breakdown (corona)
-
Electron, positive and negative ion fluid model
-
Two choices: with or without allowable space charge (with or
without convective derivative)
-
Useful for gamma ray interaction with air; air
breakdown
-
Boundary Conditions
-
Perfect conductor
-
Mur, Fang-Mei
-
Low frequency magnetostatic
-
PML
-
As many as 6 symmetry planes allowed.
-
Sources: voltage, current, current density, magnetic current
density, electric fields, magnetic fields, plane
waves
-
Plane wave sources for objects
-
In free space
-
Over lossy earth
-
On or within lossy earth
-
Frequency domain post processing
-
Fourier transforms
-
Transfer functions
-
S
parameters
-
Input impedances
-
Radar Cross Section
-
Filtered results
-
Input, reflected, and available powers
-
Far Field extrapolation
-
In free space
-
Over perfectly conducting ground plane
-
For radiated emissions, antenna patterns, scattering cross
sections
-
Sub grid feature in two steps
Advanced capabilities and features of EMA3D version 3
-
Independently variable mesh in
x,
y,
or
z-directions
-
2D solutions for any two of the Cartesian coordinate
axes
-
Thin gaps can contain any material, including non-linear
air.
-
Self consistent surface and transfer impedances for thin sheets,
such as ITO (indium tin oxide) coatings or carbon fiber
composites
-
Improved thin wire algorithm
-
Availability of a variety of
RLC
passive terminations
-
Imbedded in any kind of medium
-
User specified inductance per unit length
-
Functions with symmetry planes
-
Isotropic electric and magnetic materials with
frequency
dependence. That is, electromagnetic parameters
can all be represented with
a set of any number of user defined 1st
and 2nd
order rational
functions
-
Anisotropic electric and magnetic materials with user defined
frequency-independent tensor elements
-
Additional boundary conditions
-
Low frequency electrostatic
-
Perfect magnetic conductor
-
Periodic in
x,
y,
z,
or in any combination
-
Different boundary conditions can be applied to each boundary
surface
-
Inclusion of any number of implicitly meshed isotropic linear or
non-linear media.
These “background media” are not meshed in the GUI, but
are implicitly meshed in the solver, greatly reducing size of the meshed
problem.
-
In addition to the probes already available which can be used to
import results into CADfix, other powerful probes are now available which produce 3D
results and geometry visualizations directly from the solver itself, as well as
column formatted ASCII data files
-
Screen Probe: allows the user to write certain electromagnetic
quantities to the computer screen (or to a log file) such as
the
x,
y,
and
z
components of the electric and magnetic fields, thin wire currents,
and thin gap voltages.
-
Time and Frequency Domain Probe: similar to the Screen Probe, with
the addition of frequency domain results, such as the fast Fourier
transform and transfer functions. The frequency domain results are
computed “on the fly” and written to column formatted
data files at the end of the simulation. A Prony algorithm option
is also provided.
-
Bulk Current Probe: allows the user to output the total current on
surfaces or volumes containing several nodes.
-
Picture Probe: allows the user to create time domain or frequency
domain (FFT, transfer functions) pictures of the
electromagnetic behavior of the structure being
modeled.
-
Slice Probe: allows the user to create time domain or frequency
domain (FFT, transfer functions) pictures of the electromagnetic behavior on slices through the finite difference
problem space.
-
Structure Probe: allows the user to create Postscript files of the
structure being modeled. The user has the ability to specify what
material or structures are desired and the corresponding
color.
-
Fine Structure Probe: creates a text file displaying the material
or geometry at each field component location. This is useful if one
wants a detailed understanding of the structure being
modeled.
|
