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XGtd® High Frequency Antenna Analysis Software

XGtd® is a ray-based electromagnetic analysis tool for assessing the effects of a vehicle or vessel on antenna radiation, predicting coupling between antennas, and predicting radar cross section (RCS).  It is ideally suited for applications with higher frequencies or very large platforms where the requirements of a full physics method may exceed available computational resources.


X3D RCS Model

X3D RCS Model is a GPU-accelerated, multi-threaded 3D propagation model providing highly optimized calculations for far zone radar cross section (RCS) analysis, using methods based on Physical Optics (PO), the Method of Equivalent Currents (MEC), and the Uniform Theory of Diffraction (UTD).

Full 3D Model

The Full 3D propagation model predicts the paths by which energy travels from the transmitting antenna to the receiving location. This model supports interactions with structures in the near zone for applications such asco-site interference analysis, anechoic chamber analysis, or far zone antenna radiation from a platform-mounted antenna. It also provides an alternative method for predicting far zone RCS.

Graphical User Interface

XGtd's modular 64-bit GUI makes it easy to import objects to set up projects for various electrical large platforms. Users can simulate co-site analysis, antenna placement, radar cross section, and anechoic chambers.

Feature Import

Support for KMZ, COLLADA, STL and DXF formats for object import.

Large Platform Simulations

XGtd’s methods are less impacted by the platform’s electrical size than full wave techniques, supporting larger structures and higher frequencies.

Ray Path Visualization

Display ray paths for far zone antenna gain, RCS calculations, or antenna coupling. Rays are colored according to strength, allowing users to identify scattering features.

XFdtd Compatibility for Higher Fidelity Antenna Patterns

Calculate antenna radiation patterns for complex antenna designs using XFdtd. Import into XGtd to determine effects of placement on electrically-large platforms.


Import simulated antennas from XFdtd or create textbook antennas for use as transmitters and receivers.


Electrical properties of the scene can be defined down to the facet level. An installed database of materials includes metal and absorbers.


Users have quick access to outputs such as direction-of-arrival, complex impulse response, E-field vs. time, and E-field vs. frequency for each transmitter-receiver link. These ASCII-based files can be plotted in the tool or easily post-processed externally. S-parameters are exported to touchstone.

Antenna Placement Image

Antenna Placement

Remcom’s antenna modeling software tools ensure proper design and placement of antennas in almost any application. Our simulation tools can work alone or together for a complete analysis of how an antenna will perform.

Antenna Placement
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Radar and Scattering

Remcom’s software products are important tools for analyses including Radar Cross Section (RCS) computation, radar antenna design, and scattering applications.

Radar and Scattering
Wind Turbine Image

Wind Turbine

Remcom's radar scattering tools measure the impact that wind turbines and wind farms have on radar returns for Air Traffic Control (ATC) radar, early warning radar, weather radar, and instrumentation radar.

Wind Turbine

XGtd Documentation and Learning Resources


XGtd Specifications


XGtd Capabilities

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

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


XGtd System Requirements

System Requirements

Intel i3
Intel i7 or better
Dual Intel Xeon
8 GB
16 GB
32 GB
Hard Drive Space
250 GB
500 GB
Solid State Drive
XStream® GPU Acceleration
NVIDIA CUDA capable card, compute capability 3.0 to 5.2. *
NVIDIA CUDA capable card, compute capability 3.0 to 5.2. *
NVIDIA CUDA capable card, compute capability 3.0 to 5.2. *
2 GB
5 GB
12 GB

GUI - Supported Platforms:

  • Microsoft Windows 7, Windows 8, and Windows 10, 64- bit

Computation Engine - Supported Platforms:

  • Microsoft Windows 7, Windows 8, Windows 10, 64-bit
  • Red Hat Enterprise Linux 6, 64-bit (and compatible systems)

Request Pricing

XGtd Professional Support

One year of Remcom Professional Support (RPS) is included with each product you purchase. Maintaining your license ensures that you will always have access to technical support and that you receive free product upgrades!

  • Personal attention: speak directly with our engineers
  • Product upgrades included
  • Issue resolution, including escalation to higher management if necessary
  • Toll-free phone and email support availability

Support is available from 9am-5pm Eastern Time, Monday-Friday.

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