NRF8001 antenna tuning

[tilitililili]

Hello!

I've developed a board with NRF8001 module mounted on it. Antenna on the board is much longer than in reference designs, so I can change the length. I also can add shunt capacitor/inductor. The problem is that I don't have a network analyzer. So is it real to tune the antenna without using special instruments?

[FormerMember]

If you don't have any range at all, it is possible that the layout is the problem. It is very important the RF part of the layout is a copy of our reference layout: It means that not only the component values should be the same as in our reference layout, but also the distance between the components and the geometry between the components.

[tilitililili]

Hello!

RF part is a full copy from nRF8001-Reference Layout_Ver1_0.