How it Works
EMI Analyst™ is computer analysis software that calculates frequency domain electromagnetic interference for cable-connected circuitry and equipment.
EMI Analyst™ is an intuitive, solution-focused software tool that models circuitry, filtering, wiring, and shields. Why? Circuitry connected to electrical cables is responsible for most EMI problems.
Electromagnetic Interference has four quadrants.
EMI Analyst™ has four applications.
EMI Analyst™ combines all four applications into a single integrated program that runs on Microsoft Windows®.
Calculate interference for
- Input and output power converters
- Digital data buses such as RS-485, Ethernet, CAN bus, and USB
- Control Inputs/Outputs
- Status Inputs/Outputs
- Analog instrumentation
- Waveform shaping
- Common mode parasitics
- EMI filter topology and component values
- Cable shielding and terminations
- Field-to-wire coupling
- Wire to field radiation
- Filter insertion loss
- Cable input impedance
- Circuit impedance
- Waveform spectrums
EMI filter design
- Insertion loss
- Parasitic elements
- Component effects
Start to finish EMI analysis
- Conducted emissions
- Radiated emissions
- Conducted susceptibility/immunity)
- Radiated susceptibility/immunity)
- Compare directly to limits
- Shielding effectiveness
- Transfer impedance and admittance
- Braid optical coverage, weave, gauge, material
- Metalized tape shields
- Termination method, materials, and dimensions
- Termination impedance
- Height above ground
- Cable length
- Shield design and termination
- Qualification by Similarity analysis
- Input Impedance
- Control common mode conducted emissions
- Control radiation caused by common mode noise
- Effect of signal integrity on radiated emissions
EMI Analyst™ provides a bridge between circuit analysis and electromagnetic interference.
Using common circuit analysis techniques, EMI Analyst™ frees electrical engineers from complex EMI modeling and calculations and lets them focus on making sure their designs are free of interference.
Put just the right amount of EMI protection in your circuitry. Ensure a robust design without over-designing.
EMI Analyst™ integrates four analysis tools into a single program.
Conducted Emissions –
Compare voltage and current levels directly to specification limits. CE Analyst™ data sheet.
Conducted Susceptibility –
Simulate interference induced by bulk cable injection. CS Analyst™ data sheet.
Radiated Emissions –
Model cabling, filtering and shielding to predict field radiation levels. RE Analyst™ datasheet.
Radiated Susceptibility –
See just how much noise couples from electromagnetic fields. RS Analyst™ datasheet.
EMI Analyst™ seamlessly employs several analysis methodologies when calculating electromagnetic interference. The blend of algorithms and computation engines depends on the type of analysis.
EMI Analyst™ integrates full wave 3D field solver, network analysis, multi-conductor transmission theory, linear algebra, and numerical analysis methods.
Each of EMI Analyst™’s four applications uses a different mix of methods to achieve accurate, efficient results.
Conducted emissions are calculated using CE Analyst™, one of four applications that comprise the EMI Analyst™ software suite.
CE Analyst™ uses network analysis and transmission line theory to calculate frequency domain current and voltage conducted on power and signal lines.
Active circuits produce both differential mode and common mode signals. CE Analyst™ accounts for both, and models the complex interactions between the waveforms, filtering, cabling, and circuitry in the system. The analysis clearly graphs current and voltage conducted on the cables and distributed to each circuit element and shows how it compares to conducted emissions limits.
See the CE Analyst™ product page for more information.
CS Analyst™ rapidly computes voltage and current induced by interference coupled to power and signal wiring.
Low-frequency electromagnetic fields and bulk current injection tests induce noise on cable conductors that can interfere with cable-connected circuits. The induced waveforms redistribute in complex, sometimes unexpected ways as they propagate along the cable length.
Mutual inductance and capacitance between cable conductors cause energy injected at one point to show up elsewhere at different levels. The voltage that appears at the end circuits has the potential to upset susceptible circuits or even cause damage.
CS Analyst™ uses network analysis and transmission line theory to calculate how injected frequency domain signals distribute along the cable length, propagate through connectors, interconnect wiring, EMI filtering, and induce interference at critical circuits connected to the conductors.
Use CS Analyst™ to design systems and equipment that are compliant with conducted susceptibility and conducted immunity requirements.
See the CS Analyst™ product page for more information.
RE Analyst™ computes electric and magnetic fields radiated from cable conductors.
Fields emitted when radio frequency current and voltage flows on conductors is a significant source of electromagnetic interference. Controlling this radiation is one of the most challenging aspects of electronic system design.
RE Analyst™ handles it easily. The software computes field levels any distance from the cable using a full wave 3D field solver, and provides horizontally and vertically polarized field levels. RE Analyst™ uses the physical properties of the cables and the electrical characteristics of the circuitry connected to the cables and produces results that are directly comparable to specified radiated emissions limits. It even takes into account cable shielding.
See the RE Analyst™ product page for more information.
RS Analyst™ calculates field to wire coupling.
When exposed to electromagnetic fields, the coupling between the field and cable and between conductors within the cable creates composite distributions of voltage and current. As the induced signals propagate the length of the line, resonant effects and interaction with circuit elements sometimes produce surprisingly voltage and current levels. EMI Analyst™ uses transmission line computation methods and network analysis to calculate induced effects.
Levels induced on each conductor and in the circuitry at each of the cables are solved and displayed. The effectiveness of each protective element is evident, so shielding, filtering, and circuitry can be optimized to operate in the presence of electromagnetic fields.
You do not have to be an EMI expert to use EMI Analyst™.
It is only necessary to have a basic understanding of EMI test requirements and setups and to have an electrical engineering background.
EMI Analyst™ was developed specifically to allow electrical engineers with a working knowledge of EMI requirements to perform expert analysis, even if they are not yet EMI expert.
However, many of our users are EMI experts.
That is because EMI Analyst™ offers capabilities that are essential for designing EMI controls. Top EMI consultants and EMC engineers rely on EMI Analyst™ for analyzing and optimizing their designs.
As you use EMI Analyst™ your understand of electromagnetic interference grows. Seeing the effect each system element has on EMI reinforces what you already know and provides insights into the complex interactions that make EMI such a challenging subject.
EMI Analyst™ does not require a high-end workstation to operate.
The software runs on any PC or laptop running Windows. Of course, more RAM, more CPU cores, and higher clock speeds up your analyses. Most EMI Analyst™ analyses run in just a few minutes. However, some analyses may take several hours, particularly for long cables and high frequencies. For those times, more processing power reduces analysis time.
EMI Analyst™ licenses are available for installation on your computer or network server, or access through our cloud platform.
EMI Analyst™ does not require special hardware, and can be run on most desktop or laptop computers. Of course, having a faster multi-core processor with more RAM allows for faster computation.
Windows 7 or later, 32-bit or 64-bit
1 USB port, 2.0 or later
4 GB RAM or more
200 MB hard drive space
All that is needed to run EMI Analyst™ on our cloud platform is an Internet connection.
Dropbox, Google Drive, or OneDrive account