I am looking over the stack-up for the dev board which I received from an FAE and has designed in a 50mil width PCB antenna. I am using this online calculator here:
From this calculator and based on the board specs I am not seeing 50mil being a 50-Ohm trace with the given PCB stack-up. Can you explain why/how Nordic arrived at 50 mil with the attached stack-up? I am not sure why my calculations aren't matching Nordic's.
PCB antennas are not transmission lines. The impedance of the antenna can almost be anything and needs to be matched to the transmission line (normally 50ohms) from the balun (chip or discrete…
The shape of the antenna used is decided by tuning the antenna on the board. So we start with a basic length at about 1/4 of a wavelength and the tune the antenna manually. We follow the steps shown in…
You have a 4 - layer board: