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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-EME Module:

Ship EDF-EME provides a single environment for all the different tasks required to perform EMC/EMI 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-EME includes the tools and solvers required to produce electromagnetic models covering the whole frequency spectrum of a modern naval ship and to perform EMC/EMI analysis of all aspects of a ship’s integrated antenna systems including radar, communications, weapons systems and navigation. In addition it can perform various radiation hazard assessments including Hazards of Electromagnetic Radiation to Ordnance (HERO), Personnel (HERP) and Fuel (HERF) assessments.

Ship EDF-EME Naval EMC/EMI Electromagnetic Analysis


  • Complete solution with full band capability;
  • Fully customizable;
  • Part of the Concurrent approach offered by IDS through the Ship EDF solution that guarantees the right workflow and the best results while saving time and money;
  • Easy and intuitive graphical user interfaces;
  • Efficient and stable management of all data required during design phases.


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, transmitters, receivers, cables etc.), components (guns, ventilation grids etc.), materials, regulatory norms (Radiation Hazard) is fully customizable using the provided interface.

The Equipment management provides dedicated tools which allow the user to insert all the required parameters through intuitive GUIs and immediately preview the EM performance of the created objects.

Radiation Hazard Norm InterfaceThe library of regulatory norms and standards to be used inside projects in order to assess radiation hazard risks can be fully customized to include national specific levels. For each applicable norm the user can define single or multiple threshold curves in terms of maximum electric field, magnetic field or power allowed. Each standard is identified by its proper name edited and stored using the Radiation Hazard Norm interface.



Material EditorThe Material Editor tool is used to define the EM characteristics of materials to be used in the EM mesh which will be used 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.

The 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.









When dealing with complex designs obtained through several iterations, such as military warships, and which represent balanced compromises between a wide range of design criteria including mechanical, structural, combat system performance, and radar and infrared signatures, 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 Equipment Definition

A 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.

Ship EDF AEM MesherThe 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-EME includes comprehensive performance simulation procedures to analyze:

  • Far Field antenna coverage and radiation diagrams
  • Radiated Near Field strength
  • Inter-Antenna Coupling

A dedicated post-processing environment allows the computation of:

  • Radiation Hazard areas, applying standard normative data stored in the Ship EDF Normative Database
  • Multiple antenna coverage maps and subsystem performance assessment for communication subsystems
  • EMI analysis of Receiver/Transmitter (RTX) chains based on Coupling data

Ship EDF-EME contains a comprehensive electromagnetic suite which caters for a range of frequency bands and includes the following solving methods:

  • Standard Method of Moment (MoM), out-of-core and Multilevel Fast Multipole Method (MLFMM)
  • Physical Optics (PO)/Physical Theory of Diffraction (PTD)/Incremental Theory of Diffraction (ITD)
  • (Uniform) Geometrical Theory of Diffraction (UTD/GTD)

In addition, diagnostic tools are available to investigate propagation phenomena through induced current and ray tracing visualization.


  • Managed equipment libraries – dedicated library management functions allow the creation and storage of electrical and mechanical equipment details needed to create models for simulation and post-processing.
  • 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.
  • 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.