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Ship EDF is a software framework conceived for the electromagnetic design of naval vessels. It is a comprehensive system capable of supporting concurrent electromagnetic design and assisting the optimization of naval platforms. It is a modular system which can provide coverage for EMC/EMI assessment including antenna placement and radiation hazard identification, as well as radar cross section (RCS) and infrared (IR) signature analysis.

Ship EDF-RCS Module:

Ship EDF-RCS provides a single environment for all the different tasks required to perform RCS analysis including structure and material modeling, simulation task management and result post processing. It provides an intuitive graphical interface for CAD manipulation and for displaying the results of post processing, as well as a database which provides efficient and stable management of all the data required for the design phase.

Ship EDF-RCS Naval Radar Cross Section Analysis


  • customizable guaranteeing evaluation in free-space or sea environment;
  • easy and intuitive graphical user interfaces;
  • efficient and stable management of all the data required during the design phases;
  • part of a concurrent approach offered by IDS through the Ship EDF solution guaranteeing the right workflow and the best results while saving time and money.


Go to the video section to view film demonstrations of our naval solutions

The use of standardized commercial components shared between several projects, together with customized solutions, is a typical practice on ship design projects.

Ship EDF includes an embedded comprehensive library management system to match the needs of the designers throughout a project’s different stages.

The library of equipment (antennas), components (guns, ventilation grids etc.), materials (isotropic and anisotropic FSS) and radar threats is fully customizable through the provided interfaces.

The equipment management provides dedicated tools which allow the user to insert the scattering model suitable for RCS analysis through dedicated component projects.

RCS Mesh Modeler


Material AnalysisThe Material Editor Tool is used to define the electromagnetic (EM) characteristics of the materials which will be used in the EM mesh, and which will be taken into account by the solvers during computation. Once defined, the EM behavior of the material can be preliminarily analyzed by inspecting its Reflection and Transmission coefficients, both as a function of the incidence angle and of frequency.





FSS ModelerThe following material classes can be managed:

  • Perfect conductor;
  • Half space dielectric;
  • Grid;
  • Dielectric slabs, either with air or PEC termination;
  • Surface impedance;
  • Multilayers, either with air or PEC termination;
  • Materials defined by measurements or characterized by different tools;
  • FSS (anisotropic materials).


Radar Threat EditorThe Threats editor Tool is used to define the EM characteristics of the radars which will be used in the advanced post-processing of the RCS analysis, for the computation of detection range and detection probability, Range Advance Factor and Self Screening Range. This data can be associated with both search radar and sea-skimmer missiles. Using the same tool the user can also insert the EM characteristics of Jammers and ESM radar into the library in order for them to be considered in the advanced computations.



When dealing with complex designs, such as military warships which are a balanced compromise between several structural aspects and combat system performances obtained through several iterations, the importance of correctly managing the project data assumes a level of significance comparable with the validity of the mathematics behind the numerical simulations.

In the Ship EDF framework, a Ship Project is the top level entity which collects all the data related to a particular ship (the concept is also extended to components in the case of RCS signatures).

The data related with a project can be classified into the following categories:

  • Ship CAD models;
  • Equipment and component configurations;
  • Electromagnetic mesh models (whole ship or subparts);
  • Analyses, including all the related post-processed results.

The Ship EDF framework implements a versioning mechanism on projects that allows the user to keep a record of iterations of the design evolution of the equipment configuration.

In general, Ship EDF considers a design version valid when it is characterized by:

  • 3D CAD drawings of the Ship;
  • Equipment configuration.

The configuration of the equipment on the ship, together with the CAD drawings, constitutes the essential information for the project setup.

CAD drawings can be imported from several formats (such as Microstation (DGN), AutoCAD (DWG), CATIA (CADPART), IGES etc.) and can be edited and managed in Ship EDF thanks to the integration between Ship EDF and Bentley Microstation.

Ship EDF Equipment ListIn Ship EDF the Equipment Configuration defines a set of antennas, susceptible items and other passive components, the “Combat System Equipment List”, along with their positions on-board ship.

The “Combat System Equipment List” is setup within a specific section of Ship EDF (accessible from the main toolbar) which opens an interface allowing equipment to be picked up from the database and placed on the CAD model of the ship.


The Equipment Configuration functions of Ship EDF allow the user to view, customize, create and/or modify the Combat System Equipment List and to manage the Equipment Configuration of the active project version.

Ship EDF AEM MesherA meshing tool is embedded within the Ship EDF framework which provides a comprehensive environment dedicated to the preparation of numerical models (mesh) suitable for the electromagnetic solvers.

The AEM Mesher tool (completely developed by IDS) provides an intuitive GUI based on OpenGL ® graphics libraries and is able to import geometries from Bentley Microstation (through dedicated control interfaces working inside the CAD) or directly by reading external CAD files such as CATIA, NATRAN, IGES etc.

The interface is unique and independent of the working band or type of mesh under construction (EMC, RCS, IR) and is automatically configured by the framework to propose to the user the functions and options required for the current mesh type.



Ship EDF-RCS can perform the following standard prediction analysis functions:

  • Monostatic and Bistatic swept angle RCS diagrams
  • High Range Resolution Profile (HRRP)
  • 2D and 3D imaging
  • Analysis of the effects of the Hungry Horse Effect on RCS
  • Hourglass Analyses

In addition, Ship EDF-RCS can perform the following advanced prediction analysis:

  • Inverse Synthetic Aperture Radar (ISAR)
  • Moving target
  • Sea Skimmer engagement simulation (simplified scenario)
  • Sea contribution and multipath – RCS prediction accounting for water path attenuation and reflection using a standard physical optics (PO) approach or fast statistical post-processing.

The frequency domain polarimetric RCS values can be calculated by choosing the most appropriate technique from among:

  • Physical Optics (PO)/Physical Theory of Diffraction (PTD)/Incremental Theory of Diffraction (ITD)
  • Shooting and Bouncing Rays (SBR)
  • Out-of-Core Method of Moment (MoM)


  • Managed equipment and component libraries – dedicated library management functions allow the creation and optimization of the EM equipment and component models that will be stored in the database and incorporated in the ship model used to create RCS predictions.
  • Material database – each part of the ship’s structure can be assigned different material characteristics selected from a choice of: perfect electric conductor (PEC); parametric user defined materials; or from a lookup table stored in the material database.
  • Project database management – data is associated with individual ship projects to ensure data evolution tracking and data consistency through all design phases.
  • Hot Spot identification – a function which superimposes the scattering magnitude of the reflection directly over the 3D mesh model of the ship.
  • Post-processing and statistic computations – the post-processing environment can display raw RCS data and extract effective analysis parameters from it by applying filters and statistical functions.
  • CAD import and manipulation – the Bentley Microstation based CAD platform is compatible with many other standard CAD file formats such as Autocad, CATIA and IGES.
  • Parallel computation and task dispatching – the task dispatching procedures allow solvers to run on computation nodes that can be reached through a standard network, making use of any available resources. A procedure management subsystem allows the easy management of tasks queued to run overnight or the easy suspension and restart of low priority computations.