Please note that JavaScript and style sheet are used in this website,
Due to unadaptability of the style sheet with the browser used in your computer, pages may not look as original.
Even in such a case, however, the contents can be used safely.
Key Functions
EMIStream and EMC Expert Option
EMIStream allows engineers who have a little knowledge about EMI to filter possible EMI problems at PCB design phase and fix them following advice by EMIStream. Threshold and parameters are set with efficient default values through product development experience and research result by NEC laboratory and collaboration with universities.
EMC Expert Option is add-on option of EMIStream. This option is available for professionals which allows you to customize in-depth threshold and parameters by your EMC engineers or consultants and it provides you more accurate analysis result.
In addition, it enables you to transfer the settings by EMC Expert Option into EMIStream. It makes easier to share your EMC engineers knowledge with other fellow engineers or outsourcing design bureaus.
EMIStream Key Functions
To learn about ESD Rule Check Option and Power Integrity Analysis Option, please visit options page.
1. EMI Design Rule Check
This function indicates advice against scanned component, trace and plane location.
EMIStream's 13 rule check items are boiled down from huge amount of historical know-how for EMI suppression countermeasures and verified by NEC laboratory and local and overseas university researchers with logical background.
Therefore, EMIStream uses most valuable items for real world PCB design.
13 Rule Check Items
Return Current Path Discontinuity Check
- Reference Change
- Return Current Path Discontinuity
- Traces Near Plane Edge
- SG Trace
- SG Via Spacing
Power Plane Check
- Grounding Vias Along Plane Outline
- Decoupling Capacitor
Trace Check
- Trace Length
- Via Count
- Estimated Radiation
- Filter
- Differential Signal
- XTalk
Error Filtering Function
This function allows you to filter errors and hone in on critical problems relevant to your design. The Design Rule list will allow you to look at certain rules of your choice as well as narrow down the frequency range (of the nets). The Error Point list is organized by number of error points which also gives you the frequency range columns. You can customize the frequency and error point ranges.
EMI Check Report Function
You can export EMI Check results as an HTML format. It displays the error, location on PCB, and advice on how to fix the problem. This will be very useful when sharing results with fellow engineers or a outsourcing design bureau.
You can edit comments and customize the report to fit your needs.
Estimated Radiation Value Graph Display
Frequency spectrum chart display of estimated radiated electromagnetic field. At a glance you can see the problematic frequency range. The Expert Option will allow you to set IC rise time and damping/termination resistor value for individual nets and override the global value that is set in the parameter. By putting in specific parameters for nets you can get more accurate results.
2. Power/ Ground Resonance Analysis
EMI increases if resonance occurs between the power/ground. The Power/ Groung Resonance Analysis Function takes into account plane shapes, capacitors, and distance between the power/ground planes to analyze resonance based on the PEEC (Partial Element Equivalent Circuit) method.
Far Field EMI Calculation
Far Field EMI is calculated by plane edge voltage (one pair of ground and power). It will display far field horizontal/vertical frequency characteristics and azimuth pattern. You can adjust calculation environment such as the position of the PCB on the turn table, distance to antenna, and antenna height.
Multi-layer Resoance Analysis
You can analyze multiple layers at a time. Not only will you be able to reduce resoancne by changing capacitor placement, now EMIStream will allow you take via placement into account and change/add location as needed.
