I used some online calculator to calculate parameters of trace so it has 50 Ohm impedance.
I use FR-4, so H=1.5mm, T=0.035mm and Er = 4.5. 2-side PCB, one side with signals, the other with GND. I set the calculator to "microstrip" and for this data it told me to make trace width = 2.73 mm…
That's more than 100mils for width, most of my traces have 8-10 mils. I'm connecting DRAM to uC, there's no possibility I can me those traces so wide.
So how people achieve 50 Ohm impedance with reasonable traces width?