Electromagnetic Interference/Compatibility (EMI/EMC)

ANSYS electromagnetic and circuit technologies empower engineers to mitigate potential EMI

Performance, Safety and Compliance

Electronic systems are often safety or mission critical. They form the backbone of global technology disruptions, from 5G-connected devices to autonomous vehicles and the Internet of Things. As performance requirements increase and electronics proliferate, the risk of interference leading to degraded performance, unintended consequences—or even failure—rises dramatically. With simulation, EMI/EMC issues can be resolved in advance, with reduced physical testing to deliver high-performance, safe and compliant designs.

The world’s growing array of wireless environments—from antennas filling cities to smart devices filling homes—requires engineers to understand potential interference issues, ranging from the circuit board to the end use surroundings. With the potential for interference and performance degradation in our growing world of wireless systems, simulation lets you understand issues early and solve for interference and efficiency.

Mitigate EMI Issues in PCBs using SIwave

Workflows Simulate Any Electromagnetic Situation

PCB and Component Design

EMC compliance can be simulated with Ansys’ near/far field EMI, parasitic extraction and circuit simulation capabilities.

Cable Harness Design

With a streamlined cable simulation workflow that’s able to handle complex structures and cable routing, placement can be determined with appropriate shielding to minimize cross talk, radiation and susceptibility

Antenna Design and Placement

With full wave electromagnetic field solvers and an electromagnetic interference toolkit, installed antenna radiation patterns can be determined for optimal placement to minimize co-site interference. 

System Integration

Cable and circuit simulations – including shooting and bouncing ray plus techniques and full wave field electromagnetic solvers – enable the performance of electronic subsystems to be examined in electrically large environments.

Ansys Electronics Desktop

Ansys Electronics Desktop enables engineers to easily combine the unmatched accuracy of Ansys electromagnetic 3D and 2.5D field solvers and the powerful circuit- and system-level solutions in Ansys RF Option to diagnose, isolate and eliminate EMI and radio-frequency issues (RFI) early in the design cycle. Automated workflows in ANSYS Electronics Desktop leverage easy mechanical CAD (MCAD) and electrical CAD (ECAD) system assemblies to simulate complete electrical devices, increase their immunity and meet EMC standards using a single simulation platform.

Users can take advantage of the seamless workflow in Electronics Desktop, which includes advanced electromagnetic field solvers, and dynamically link them to power circuit simulators to predict EMI/EMC performance of electrical devices. These integrated workflows avoid repetitive design iterations and costly recurrent EMC certification tests. Multiple EM solvers intended to address diverse electromagnetic problems, as well as the circuit simulators in Electronics Desktop, help engineers assess the overall performance of their electrical devices and create interference-free designs. These diverse problems range from radiated and conducted emissions, susceptibility, crosstalk, RF desense, RF coexistence, cosite, electrostatic discharge, electric fast transients (EFT), burst, lightning strike effects, high intensity fields (HIRF), radiation hazards (RADHAZ), electromagnetic environmental effects (EEE), electromagnetic pulse (EMP) to shielding effectiveness and other EMC applications.

For ECAD system assemblies, engineers can utilize automatic and customizable EMI design rule checkers on printed circuit boards (PCBs) as preparatory steps to quickly identify potential interference problems prior to running simulations. Included in Ansys HFSS and Ansys SIwave, the EMI Scanner identifies potential locations in a PCB requiring further inspection and offers recommendations to remediate these problems. Consequently, simulation runtimes are considerably reduced.

Ansys offers a cohesive solution to eliminate EMI and RFI issues and meet stringent EMI/EMC standards — a critical step for bringing an electronic/electrical product to market. These simulations from Ansys lead to substantial savings on expensive EMI/EMC testing and avoid delays in product launch.


  • Industry-leading 3D static and full wave solvers
  • Comprehensive circuit simulation tool for EMC analysis
  • Powerful hybrid solvers for electrically large models
  • Geometry-based EMC, SI and PI rule checking
  • Ability to easily merge ECAD and MCAD models for EMC simulations

RF Desense

RF desense is a critical design challenge faced by engineers creating wireless products. Due to miniaturization, faster digital signals, multiple wireless systems and radios operating simultaneously within a small footprint, the sensitivity of receivers is compromised significantly. These trends in the industry are causing engineers to demand a robust solution for RF desense. Ansys HFSS and EMIT can help engineers diagnose and mitigate problems of RF desense in wireless electronic devices across a broad range of industries. These advanced simulation tools can analyze large, complex electronic devices with a multitude of signals and receivers, allowing you to run what-if scenarios and eliminate desense.

EMIT’s powerful system-level RF analysis tool lets you start with behavioral radio models from the built-in library and continuously enhance the model as better data becomes available during the design. EMIT’s advanced visualization and automated diagnostic capabilities help you identify and investigate all the sources of interference and study their effects on the victim receivers at various levels of granularity.


With Ansys HFSS and SBR+ you can:

  • RF system solver optimised for fast solution involving tens of millions of potential radio frequency interference (RFI) paths.
  • Built-in standards-based radio library and RF components.
  • Wideband models and analysis to include in-band and out-of-band interference, including nonlinear phenomena such as intermodulation, harmonics, spurious responses and broadband noise.
  • Detailed visualisation and diagnostic tools for a complete picture of the sources of interference and how to mitigate them.
  • Scenario matrix for rapid, high-level visualisation of problematic RFI issues.
  • Signal traceback in interaction diagrams for detailed graphical information identifying the root-cause of the RFI.
  • Wideband plots of received interference power with pointers identifying each contributor and its root-cause.
  • Early simulation in the design of wireless devices to catch, diagnose and mitigate RFI issues.

Ansys Software to Consider

Ansys HFSS


Ansys SIwave


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