In a new circuit design, I need some impedance matching for some high speed traces (i.e. Ethernet, USB, SD card...). Usually I define tracks width with this web tool https://www.eeweb.com/tools/microstrip-impedance
Now for the first time I have to use a 4-layer board and I would like the traces in one of the 2 internal layers (so I can better shield these signals). Which one of the types of microstrip should I choose? (Embedded Microstrip, Asymmetric Stripline...?)
And also, since there will be other traces to match that are close to each other, will they influence each other?
Thank you very much.