I am laying out a PCB containing an Ethernet connector with integral magnetics, and a Micrel KSZ8051MNL Phy. This is for a 100mbps application.
In an attempt to reduce EMI, and make the Ethernet data tracks as perfectly balanced as possible, and to match their lengths as closely as possible, I have ended up routing them in quite a curvy way.
Question 1: Is it worth going to this effort for such short tracks? The trivial way to lay out these tracks would have resulted in a difference of about 1.7mm.
Question 2: Is there any downside to this almost 360º loop?
(BTW, the Phy has integral terminators, which is why they don't appear on the PCB.)