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

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.
 
Conducted Susceptibility

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.
 
Radiated Emissions

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.

Radiated Susceptibility

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.