EM Modelling

Computational Electromagnetic (EM) Modelling may be used as an alternative or complementary approach to practical electromagnetic measurements, in cases where simplifications and realistic assumptions can be made.

At Eurofins York we offer a range of Computational Electromagnetic (EM) Modelling solutions to suit our customer’s needs.

Computational EM modelling

Eurofins York uses a wide range of computational modelling tools, ranging from Matlab and in-house developed code to commercial full wave solvers such as Concept II and Comsol. Modelling is based on a variety of techniques such as the Transmission Line Matrix (TLM) method.

Our experience of using these tools means cost effective methods can be readily identified and employed to meet specific requirements e.g. whether to use time or frequency domain techniques.

Powerful computational tools can also greatly assist in analysing and presenting the large amounts of data that can result from measurement programmes such as site surveys or EM mapping.

Radiated Emissions modelling can be carried out for a variety of scenarios.  As with all modelling activities there is always a trade-off between modelling effort and accuracy. Eurofins York are well placed to advise what is possible, what is probable, and what constitutes reasonable assumptions.  We have carried out modelling activities in Rail, Power generation, aerospace, automotive, defence and mobile telephony sectors.

Examples include

  • Induced voltage modelling can be carried out for a variety of reasons, mainly in the rail and power generation sectors
  • In a Railway example, concerns about interference to a signalling system on a metro network was investigated by performing simulations in the frequency range from < 50 Hz to 200 kHz, using train-borne antennas, with a resolution of ~10 m with over 90 km of track being mapped
  • Modelling of air-to-ground antennas to enable WiFi on aeroplanes
  • Modelling of enclosures
  • Modelling of screens and screening solutions for 50Hz
  • Modelling of bespoke military systems and devices
  • Resonance issues with respect to rail services and power supplies
  • Magnetic field modelling for hospital interactions and nearby transport systems
  • Antennas (develop and model)
  • Bespoke measurement setups before construction

Eurofins York has pioneered the use of Intermediate Level Circuit Modelling (ILCM) as a computational technique for rapid solution of EM problems. Where applicable, the technique offers solutions 3 to 4 orders of magnitude faster than other full wave solver computational techniques; making the difference between having a solution in seconds or days.

Contact our York office for more information on how we can help save you time and money through our computational electromagnetic (EM) modelling services.