Learning Forum

[prajput]

Hello, what emission characteristics do I need to look for when designing a high speed board?

Thank you.

[CB]

Hi - If your board is inside a metal housing then the far field emissions may not be important. The near fields above the board traces are important as they may cause some parasitic coupling to other parts of the board or to the housing itself.

[prajput]

Will vias effect my design?

[CB]

Hi - Yes vias will impact your design, especially at the higher frequencies. Another important question is how are the vias designed - is it a single via or an array of vias. Is the transmission line a single signal trace or is it a pair of transmission lines - common or differential mode?