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 RadiaSim
is an electromagnetic field simulation program
especially designed for the needs in the automotive
and electronic industry. The radiated electromagnetic
fields from Printed Circuit Boards or complex
cable harnesses, e.g. in a car chassis, can be
calculated by RadiaSim from the current density
output files of the SimLab products ARAMIS and
CableMod.
 In
RadiaSim, the user can define probe points in
three-dimensional space to determine the radiated
electromagnetic near and far fields. Limitations
do not exist regarding RadiaSim's calculation
of probe point distances or the total number of
probe points.
Probe
points can be defined as single points or by means
of two and three dimensional probe objects like
lines, circles, planes, cubes, and others.
Additionally,
the user can define antennas together with a reflecting
ground floor to set up an environment like in
a measuring chamber.
 Together
with the SimLab post-processors SLShow and SLGraph,
RadiaSim includes the necessary properties to
enable EMC engineers to study the phenomena of
radiation, understand the contest and to create
design rules for their product designs.
 Typical
Applications:
- Radiation
of cable harness into car radio antennas.
- Optimization
of coils on a PCB implemented as copper structures.
- Eases
user with cable type selection (e.g. ribbon
cable
or twisted pair) instead of comparing hardware
measurements
- Influence
of copper areas on the radiation of a PCB.
- Optimization
of cable laying in a car chassis.
- Output
measurements can be used in qualifying reduction
radiation rules from signal traces or wires.
- Impact
of resonance frequencies from the power and
ground plane on a far field radiation calculation.
Principle
Method
RadiaSim
performs 3D Full Wave analysis based on the Electrical
Field Integral Equations (EFIE). In homogeneous
material like air, this leads to very accurate
and fast solutions of the radiated electromagnetic
field. In contrast to other methods, a meshing
of the air is not required.
 The
field calculation is based on the impressed current
density distribution from distinct frequency points
that can be calculated with the SimLab products
ARAMIS or CableMod. To do so, the layout geometry
will be subdivided into small elements or segments
in order to determine the current density for
each of them. Finally, the radiated electromagnetic
field will be calculated by means of Green's functions
by summing up all current contributions.
With
RadiaSim's Method of Moment (MoM) calculations,
the induced current in receiving antennas can
be simulated. Users can quickly determine the
voltage at the aerial base of the antenna, without
hardware measurements, but similar to real antenna
measurement procedures and results.
The
combination of integral equations with the Mom
in RadiaSim highly optimizes field calculation
simulations. Compared with other methods, the
results are more accurate and obtained much faster,
even for complex systems.
Summary
of features
- Calculation
of static and dynamic E-field and H-fields.
- User
definable antennas.
- Current,
voltage and impedance calculation at the aerial
base.
- Various
kinds of probe objects with an unlimited number
of probe points.
- Possibility
to calculate the near and far fields.
- Optional
consideration of a ground floor like in the
measurement chamber.
- Frequency
range from DC up to several GHz.
- Graphical
2D result viewer with waveform calculator.
- Graphical
3D result viewer with vector animation.
- Data
output of results in ASCII format for post-processing
with spreadsheet or math programs.
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