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XGtd Capabilities


Standard Capabilities and Key Features

  • X3D RCS Model with GPU and mutli-processing for fast computations up to 100 GHz
  • Full 3D ray tracing solver, based on Uniform Theory of Diffraction (UTD) with corrections for finite conductivity materials, including thin coatings
  • Ideal solver for electrically-large platform models or scenarios
  • Plane wave phase reference
  • Creeping-wave diffraction computation for high-fidelity computation of fields in shadow zones
  • Compute far zone radiation patterns including effects of scattering from electrically-large platforms and nearby objects
  • Accurate monostatic and bistatic RCS of electrically-large platforms using Method of Equivalent Currents (MEC) and Physical Optics (PO)
  • Calculate doppler shift due to motion of transmitter or receiver
  • Analyze antenna coupling and interference at multiple frequencies
  • Import complex antenna patterns from Remcom’s XFdtd or other sources and standard formats, incorporating full polarization and phase information
  • Model wideband or narrowband pulses
  • Generate time or frequency domain output
  • Analyze propagation in anechoic chambers
  • Model transmitters as point sources, antenna arrays, distributed sources and plane waves

Optimization and Parallel-Processing

  • 64-bit version: larger, more complex models and factor of 1.5 to 2 times speedup
  • Optimized Ray Engine: speed improvement for large or complex models
  • Run calculations on multiple processors, with 8 multi-process tokens included in base price
  • Linux and Windows clusters

Graphical User Interface and Visualization

  • 64-bit GUI
  • Drag project elements with the mouse in the project view
  • Color displays of most output
  • Visualization of edges considered by the calculation to be part of curved surfaces
  • Use the powerful GUI to set up a calculation and display all results
  • 3D visualization of near zone fields and far zone antenna patterns
  • 3D display of ray paths
  • Color display of electric fields, received power and other output
  • Display 3D antenna patterns
  • Line plotting tools
  • Polar plots of antenna patterns
  • Color display of transient electric fields
  • "Movie Sequence" of transient fields vs. time
  • Export "Movie Sequence" to MPEG file
  • Export views and graphs to JPEG and TIFF files

Geometry Generation and CAD Import

  • KMZ and COLLADA support
  • DXF, STL and SAT formats
  • Automated CAD model simplification and error checking
  • Graphical geometry editor
  • Geometry validation
  • Translate, scale, rotate operations
  • Assign material properties



  • Create multiple material plots in one step
  • Multiple dielectric layers
  • Thin coatings
  • Imported reflection and transmission coefficients
  • Radiation Absorbent Material (RAM) types for anechoic chambers

Transmitters, Receivers and Waveforms

  • Transceivers: Simple co-location of functionally independent transmitters and receivers
  • Define transmitter and receiver sets on linear, planar or spherical surfaces
  • Define trajectories for transmitters or receivers
  • Sinusoidal waveforms or wideband pulses
  • Plane wave sources
  • Define transmitter and receiver antennas

Antenna Pattern Definition

  • Synthesize antenna array patterns from similar array elements
  • Numerous built-in antenna types
  • Ability to import XFdtd far zone patterns
  • Ability to import standard formats: NSMA, Odyssey, MSI Planet
  • Support for user-defined 2-cut plane antenna patterns
  • Linearly and circularly polarized source antennas
  • Ability to construct arrays from individual antenna elements

Output Types

  • S-Parameter output
  • Touchstone file export
  • Scattering amplitudes and excess times of arrival for RCS ray paths
  • Far zone ray paths, electric field magnitude and phase, complex impulse response, and poynting vector
  • Antenna gain patterns (effective far zone, including platform effects)
  • Radar cross section
  • Doppler shift
  • Received power
  • Time and frequency domain electric and magnetic fields
  • Electric field magnitude and phase
  • Poynting vector
  • Path loss
  • Ray path data (field levels, time-of-arrival, direction-of-arrival)
  • Complex impulse response
  • Carrier/interferer ratio
  • Power delay profile
  • Delay spread
  • Field animations


  • Create stored libraries of antennas, materials and waveforms