private void GenerateDirectivitySimulationInput()
{
// Constants
double unit = 1e-3;
double c0 = 299792458.0;
double lambda0 = c0 / m_f0;
double lambdaMin = c0 / (m_f0 + m_fc);
Compound simulationSpace = new Compound("space");
Compound solidSpace = new Compound("solid-space");
simulationSpace.Add(solidSpace);
Compound dut;
if (m_excludeEndo == true)
{
dut = m_endo.GetModule(m_slotIndex);
}
else
{
dut = m_endo;
}
solidSpace.Add(dut); // modifies dut parent (!)
// Set up simulation grid, nf2ff and SAR
Logger.WriteInfo("Constructing FDTD simulation grid...");
double airBox = 40;
double maxRes = Math.Round(lambdaMin / 20 / unit);
double maxRatio = 1.5;
RectilinearGrid grid = new RectilinearGrid();
grid.Add(dut.BoundingBox.P1);
grid.Add(dut.BoundingBox.P2);
#region openems_workaround
// openEMS v0.0.31 seems to handle transformations on excitation (lumped port),
// SAR and NF2FF simulation components incorrectly.
// Applied workarounds:
// 1. The entire design is moved so that the antenna feedpoint is in the origin
// 2. The SAR and NF2FF boxes are added late, w/o transformations
Vector3D antennaPosition = new Vector3D(
m_antenna.AbsoluteTransformation.X,
m_antenna.AbsoluteTransformation.Y,
m_antenna.AbsoluteTransformation.Z);
solidSpace.Transformations.Add(new TTranslate(-antennaPosition));
grid.Move(-antennaPosition);
grid.Add(new Vector3D(0, 0, 0));
grid.ZLines.Add(-(m_antenna.Parent as CSXCAD.Ara.PCB).Thickness);
grid.Sort();
grid.SmoothMesh(m_dutResolution, maxRatio);
grid.AddAirbox(airBox);
grid.SmoothMesh(maxRes, maxRatio);
simulationSpace.Add(new NF2FFBox("nf2ff",
new Vector3D(grid.XLines.First(), grid.YLines.First(), grid.ZLines.First()),
new Vector3D(grid.XLines.Last(), grid.YLines.Last(), grid.ZLines.Last()),
lambdaMin / 15 / unit));
#endregion
grid.AddPML(8);
Simulation fdtd = new Simulation();
fdtd.Excitation = new GaussExcitation(m_f0, m_fc);
// Export
XDocument doc = new XDocument(
new XDeclaration("1.0", "utf-8", "yes"),
new XComment("CyPhy generated openEMS simulation file"),
new XElement("openEMS",
fdtd.ToXElement(),
new XElement("ContinuousStructure",
new XAttribute("CoordSystem", 0),
simulationSpace.ToXElement(),
grid.ToXElement()
)
)
);
if (dut is CSXCAD.Ara.Module)
{
dut.Parent = m_endo;
}
string openEmsInput = Path.Combine(mainParameters.OutputDirectory, "openEMS_input.xml");
doc.Save(openEmsInput);
string nf2ffInput = Path.Combine(mainParameters.OutputDirectory, "nf2ff_input.xml");
var nf2ff = new Postprocess.NF2FF(m_f0);
nf2ff.ToXDocument().Save(nf2ffInput);
}
public void GenerateFarFieldSimulationInput(string outputDirectory)
{
Compound simulationSpace = new Compound("space");
Compound solidSpace = new Compound("solid-space");
simulationSpace.Add(solidSpace);
Compound dut;
if (excludeEndo == true)
{
dut = endo.GetModule(slotIndex);
}
else
{
dut = endo;
}
solidSpace.Add(dut); // modifies dut parent (!)
double airBox = 40;
double maxRes = Math.Round(lambdaMin / 20 / unit);
double maxRatio = 1.5;
RectilinearGrid grid = new RectilinearGrid();
grid.Add(dut.BoundingBox.P1);
grid.Add(dut.BoundingBox.P2);
Vector3D antennaPosition = new Vector3D(
antenna.AbsoluteTransformation.X,
antenna.AbsoluteTransformation.Y,
antenna.AbsoluteTransformation.Z);
solidSpace.Transformations.Add(new TTranslate(-antennaPosition));
grid.Move(-antennaPosition);
grid.Add(new Vector3D(0, 0, 0));
grid.ZLines.Add(-(antenna.Parent as CSXCAD.Ara.PCB).Thickness);
grid.Sort();
grid.SmoothMesh(dutResolution, maxRatio);
grid.AddAirbox(airBox);
grid.SmoothMesh(maxRes, maxRatio);
simulationSpace.Add(new NF2FFBox("nf2ff",
new Vector3D(grid.XLines.First(), grid.YLines.First(), grid.ZLines.First()),
new Vector3D(grid.XLines.Last(), grid.YLines.Last(), grid.ZLines.Last()),
lambdaMin / 15 / unit));
grid.AddPML(8);
Simulation fdtd = new Simulation();
fdtd.Excitation = new GaussExcitation(frequency, bandwidth);
// Export
XDocument doc = new XDocument(
new XDeclaration("1.0", "utf-8", "yes"),
new XComment("CyPhy generated openEMS simulation file"),
new XElement("openEMS",
fdtd.ToXElement(),
new XElement("ContinuousStructure",
new XAttribute("CoordSystem", 0),
simulationSpace.ToXElement(),
grid.ToXElement()
)
)
);
if (dut is CSXCAD.Ara.Module)
{
dut.Parent = endo;
}
System.IO.Directory.CreateDirectory(outputDirectory);
string openEmsInput = Path.Combine(outputDirectory, "openEMS_input.xml");
doc.Save(openEmsInput);
string nf2ffInput = Path.Combine(outputDirectory, "nf2ff_input.xml");
var nf2ff = new Postprocess.NF2FF(frequency);
nf2ff.ToXDocument().Save(nf2ffInput);
File.WriteAllText(Path.Combine(outputDirectory, "run_farfield.cmd"), AraRFAnalysis.Properties.Resources.run_farfield);
}