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AW Modeler: Examples
Import from AutoCAD
 Let
us go through the creation of this model in AutoCAD step-by-step.
The antenna consists of a ground plane, a
microstrip line (where one conductor is the ground plane), a
rectangular conducting patch and a dielectric substrate. Feeding of the
structure is based on proximity coupling, and the generator is
connected to the microstrip line using a thin wire. We model the
structure by polylines (polygons) that represent plates and wires.
Plates are modeled with closed, flat polylines, with arbitrary
number of vertices. Wires are modeled with arbitrary polylines.
 By
following some simple rules while you draw the structure in AutoCAD, you
enable its easy transformation into a WIPL-D Pro model. The
structure is defined with several layers, each layer with its own
specification of the electrical domain to which it
belongs. The structure is created with the 3D Polyline tool from
AutoCAD, and each layer is named according to a certain set of rules
defined in the AW Modeler user's manual.
When the AutoCAD drawing is done, it
needs to be saved in DXF file format, which is recognizable to AW
Modeler. After the launch of the AW Modeler, a DXF file is easily
imported into its workspace. There, the structure can be additionally
edited and altered. At the end of the process, you get a fully
functional, meshed WIPL-D Pro model which you can analyze to the full
extent of the program's abilities.
AW Modeling
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Modeling technique in AW
Modeler can be illustrated by creating a microstrip
narrow-band band stop filter with L-resonators. Modeling is
performed easily by using advantages and built-in tools of
AW Modeler. Layout of the filter is shown to the right.
After specification of
parametrically-defined grids, arbitrary polygons can be
drawn on the grid. The process of polygon creation is
illustrated below. The substrate and feeding parts (at
location of ports) are added as pre-defined entities.
Meshing is performed
automatically, either along grid lines or regardless of
them. The meshing that is not along grid lines is shown
below to the left.
Please
download a
brochure describing in detail the process of
building this L-filter model in AW Modeler. |
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