RE: nRF52832 chip antenna validation

Marjeris Romero — Mon, 28 Jan 2019 16:23:05 GMT

Yes, it looks like this to me at least.

RE: nRF52832 chip antenna validation

pbn4 — Mon, 28 Jan 2019 15:58:52 GMT

OK thanks for you answer. I was confused by the via's in the trace you mentioned. I assumed it's a coplanar waveguide with ground plane on the bottom layer.

RE: nRF52832 chip antenna validation

Marjeris Romero — Mon, 28 Jan 2019 14:52:29 GMT

Hi,

The radiator electrode is not connected to ground so you can let this pin unconnected in the schematics. If you take a look at the layout in the antenna datasheet the radiator electrode is connected only connected to a trace, but the trace is not connected to ground. I also found these designer notes, you should follow the dimensions for the keepout area around the antenna as specified here. The dummy pads should also be left unconnected.

There are no changes needed for the matching circuits in your schematic, you have included both the RF matching components of the nRF52832 and a L matching network for the antenna as specified in the antenna datasheet. There are some recomendations for the values of the tuning components of the antenna in the design notes i linked above, but it will be difficult find the optimal values for these components before you perform a antenna tuning with a network analyzer.

Best Regards,

Marjeris