Ship EDF – Ship Electromagnetic Design Framework


Ship EDF – Ship Electromagnetic Design Framework


Electro Magnetic Requirements

Modern naval vessels rely heavily on complex electronics for many different tasks such as surveillance, communications, propulsion control, internal power and weapons control systems. These systems all need to be able to work as designed without unwanted interference from each other and the environment. It is also important to ensure that onboard electronic equipment does not cause excessive radiation hazards to personnel, fuel or ordnance. ]

As well as being able to operate smoothly, a naval vessel needs to be able to complete its mission successfully and safely. Its electronic systems need to be able to detect and identify a threat and then to track and target the threat whether it is another vessel, a plane or an incoming missile. In order to do this, the topside electronic systems (e.g. radar, weather systems etc.) need to be working as efficiently and effectively as possible.

In addition, a naval vessel needs to be able to avoid detection for as long as possible and to present a small target when eventually detected. This can be accomplished by minimizing a ship’s radar cross section and by reducing its infrared radiation emissions.

EMA Solution

In the past, electromagnetic, infrared and radar cross section assessment would be performed through physical measurements. These would be conducted during sea trials following the completion of the new vessel and prior to its commissioning. At this stage the scope and scale of any modifications to the ship’s design are limited, expensive and time consuming.

Ship EDF allows these activities to start during the early conceptual design phase and to continue all the way through the design and construction phases to the final acceptance tests. It provides detailed models and simulations of the electromagnetic environment, infrared signature and radar cross section of a new ship’s design and makes use of advanced electromagnetic solvers as well as analytical, computational and design procedures which have been internally developed and validated in a continuous process since 1982. These aid the designer in making changes and selecting the best choices during the critical early design stages.

It includes tools to manage a project’s workflow, track its history and to store the data in a database to enable multiple projects to benefit from the same validated materials and equipment data.


Allows electromagnetic risk assessment to be performed prior to construction, saving time and money.

  • High quality solvers and analytical, computational and design procedures are supported by verified measurements.
  • Advanced post processing features which are built on IDS’s extensive experience in military naval engineering.
  • Enables the designer to easily test different configuration options resulting in the most effective designs.
  • Project versioning and traceability for highly efficient design operations. • RCS, IR and EME design all in the same environment allowing changes in one to be easily and quickly tested for the other two.



The RCS Module:

  • Fully customizable equipment sensors database and electromagnetic material characteristics database.
  • 3D geometrical modeling.
  • RCS and radar images evaluation in a free-space or sea environment.
  • Comprehensive processing tools which include diagnostic tools for identification of critical geometrical areas and RCS mitigation.
  • Operational performance evaluation (RAF, SSR, detection probability and detection range).


The IR Module:

  • Fully customizable IR material parameters and scenario definition databases.
  • 3D geometrical modeling tools for the external structure.
  • Modeling of internal compartment heat sources and exhaust ducts.
  • Parameter set up for scenario environments.
  • Temperature distribution, IR imaging and signature.


The EME Module:

  • Fully customizable equipment parameters, electromagnetic material characteristics and sensor databases.
  • 3D geometrical modeling tools.
  • Full band antenna modeling.
  • Full band simulation capability.
  • Near field and radiation hazard processing.
  • Subsystem performance synthesis.
  • Electromagnetic interference (EMI) evaluation tools which take account of transmitting and receiving antenna chains.
  • EMC/EMI risk management, customizable to project requirements.


The Below Deck module:

  • A complete set of tools for data management, analysis and processing of EMI problems in a ship’s below deck environment.
  • 3D geometrical modeling tools to model a ship’s internal compartments and cable bundle paths.
  • 3D EM solvers for the evaluation of internal near field levels and the evaluation of incident fields/currents on a 3D path.
  • Cable network analysis functions including numerical analysis based on the EM topology proposed by Baum-Liu-Tesche (BLT).
  • Post processing for cable coupling and to display internal fields.