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XFdtd Versions

XFdtd Release 7 Capabilities

The following capabilities are available in XFdtd. The biological features are exclusive to the Bio-Pro version of the product. 

XF Key Capabilities

  • XStream GPU Acceleration using NVIDIA’s CUDA architecture

  • XStream + Message Passing Interface (MPI) for GPU clusters

  • Wrap Flexible PCB

  • Circuit Element Optimizer

  • PrOGrid Project Optimized Gridding

  • XACT Accurate Cell Technology

  • XTend Script Library

  • Unlimited Memory

  • User-defined library containing Parts, Sources, Materials, and more

  • Full parameterization

  • Scripting interface with built-in editor

  • Macros

  • Waveguide Interfaces

  • Custom Project Templates

  • Feature-based modeling

  • Live-updating results

  • ESD Breakdown

  • Integrated mesh/CAD viewing

  • Volumetric/surface field saving via Sensors

  • Flexible customizable project tree

  • Simulation Queue

  • External Queue Integration (EQI)

  • Interactive graph manipulation

  • Real-time error checking with feedback

  • Automatic mesh fixed-point detection

  • Native multi-platform UI on Windows and Linux

Far-Zone Results

  • Transient far-zone - specific angles

  • Steady state 3D far-zone patterns

  • Ludwig and axial ratio polarization results

  • Radar cross section

  • Advanced antenna pattern analysis/antenna over ground plane

  • Antenna diversity, including independent PDFs for E_phi and E_theta

  • Circular polarization

Acceleration Options

  • XStream GPU Acceleration using NVIDIA’s CUDA architecture for single or multiple GPUs

  • XStream + Message Passing Interface (MPI) for GPU clusters

  • MPI multiprocessor (distributed memory clusters)

  • Multiprocessor threading for unlimited cores

  • External Queue Integration (EQI)

  • Failure detection of GPU memory

Special Capabilities/Options

  • Periodic outer boundary condition

  • Sinusoidal results at multiple frequencies via DFT

  • Scaling of sinusoidal results

  • Automatic convergence with delay options

  • Materiel and circuit component definition encryption

CAD Import/Export

  • Import ODB++ PCB files with arbitrary wrap

  • Import BRD PCB files with arbitrary wrap

  • Import ODB++ PCB files with arbitrary crop

  • Import BRD PCB files with arbitrary crop

  • Import Poseable Hand

  • Import SAT/SAB files

  • Import DXF files

  • Import VDA-FS files

  • Import STL files

  • Import STEP files

  • Import IGES files

  • Import Pro-E files

  • Import CATIA V4 and V5 files

  • Import Inventor files

  • Export to SAT files

  • Export to STEP file

  • Export to IGES file

  • Export to CATIA file

  • Export to STL file

  • Export to DXF file

  • Editing of imported CAD objects

  • CAD Merge: Retention of previous modifications when importing geometry updates


  • Dielectric Volume Averaging

  • XACT Accurate Cell Technology

  • Fast meshing algorithm (FMA)

  • Cropped 3D mesh

  • Automatic/manual control of mesh parameters

  • Adaptive mesh

  • Fast 3D mesh viewing

  • Multithreaded meshing

  • Prevent objects from touching in the mesh

Visual Output

  • Planes, surfaces and volumes of output shown with input geometry

  • E/H/B, conduction current, surface current, rotating B near fields, in addition to dissipated power density

  • 3D far field patterns of E, gain, realized gain, axial ratio, radar cross section

  • Hearing aid compatibility, SAR, MR transmit efficiency, and approximate MR image outputs

  • Biological temperature rise

  • Temperature distribution: initial, final, and temperature increase


  • Dispersive Material Calculator

  • Time dependent material

  • Materials database populated with more than 350 material definitions

  • Diagonally anisotropic electric/magnetic

  • Lossy dielectric/magnetic

  • Frequency-dependent dielectric/magnetic

  • Anisotropic magnetized ferrite

  • Anisotropic dielectric (full tensor)

  • Non-linear dielectric/magnetic

  • Thin wires with different radii

  • Surface roughness for metals

  • Dielectric Breakdown


  • Electrostatic Solver

  • Waveguide Interfaces - both modal and nodal

  • Passive loads with Series, Parallel, and RL Parallel C layouts

  • Passive loads based on SPICE netlist file

  • Multiple excitation types can be used within one simulation

  • Arbitrary time domain waveforms

  • Automatic waveform based on Frequency Range of Interest

  • Voltage/current sources with series/parallel RLC

  • Voltage/Current sources with matching network based on SPICE netlist file

  • Non-linear capacitors

  • Time-controlled on-off switches

  • Diodes

  • Photo conductive semiconductor switch

  • Incident plane wave with linear, circular, or elliptical polarization -both total and scattered

  • Gaussian beam

  • Specify time delay for each individual source

Geometry Generation

  • 3D solid modeler

  • 2D Sketcher with constraints

  • Feature-based modeling

  • Poseable Hand to grip hand-held devices

  • Arbitrary extrudes, revolves, sheets, and wire bodies

  • Complex geometry modification of created and imported geometries:

    • Wrap

    • Booleans

    • Chamfer edges

    • Blend edges

    • Shell solids

    • Remove faces

    • Offset faces and sheet edges

    • Remove holes

    • Thicken sheets

    • Loft

    • Stretch

    • Twist

    • Slice

    • Bend solid geometry

    • Project a sheet

    • Scale/translate/rotate/reflect/shear

    • Linear and circular patterns

  • Primitive geometric shapes:

    • Sphere

    • Cylinder

    • Cone

    • Cuboid

    • Torus

    • Pyramid

    • Prism

    • Frustum

    • Helix

  • Locators to easily reposition geometries

  • Cutting plane to reveal inner structure

Graphical Output

  • Dissipated Power Density

  • Near zone fields/currents vs. time

  • Impedance, S-Parameters vs. frequency, VSWR, Active VSWR

  • Polar plot antenna patterns

  • Smith chart impedance plots

  • FFT of transient results

  • Group Delay output type

  • Time Domain Reflectometry (TDR) and Time Domain Transmission (TDT) output types

Discrete Frequency Statistics

  • Radiation efficiency

  • System efficiency

  • Dissipated power

  • Component loss

  • Net input power

  • Net available power

  • Stand alone radiation efficiency

Output Export

  • Movies (*.avi): planar and volumetric field sequences

  • MATLAB: all data exportable

  • Comma separated value files (*.csv): all data exportable

  • Optenni: S-parameters and efficiency

  • Touchstone files (for example, *.s2p): S-parameters

  • CITI files: S-parameters

XFdtd Bio-Pro

The Bio-Pro version of XFdtd includes all of the standard features above, plus these additional biomedical EM capabilities:

Additional Biological Calculations Available in XFdtd Bio-Pro

  • Specific absorption rate (SAR)

  • Biological Thermal Sensor

  • Birdcage Tool

  • MR Transmit Efficiency (proportional to signal-to-noise ratio)

  • Approximate MR Image

  • B1+/B1- Fields

  • Combined SAR results from multiple simulations

  • Calculate 1- and 10-gram SAR averages

  • Whole body SAR average

  • Location of peak SAR

  • Adjust SAR levels for specified input power or current

  • Planes of SAR for color display

  • SAM head CAD file

  • Hearing aid compatibility (HAC)

  • Head and body meshes at various resolutions

  • Frequency-dependent body tissue parameters

  • VariPose® to reposition body meshes

  • ICRP, NICT and Virtual Population voxel models supported

  • Automatic assignment of correct biological materials to all imported voxel types

  • SAR statistics reporting (mass, dissipated power, mean SAR over regions)


Contact us for additional capability information or to discuss your specific needs.