nRF24AP2-8CH/Balun/SMD chip Antenna

[Didier Gibert]

Hi, I would like simplify the nRF24AP2-8CH signal RF output using a Balun with a chip antenna.

What is the best way: the 2450BM14A0002 from Johanson, the BAL-NRF01D3 from ST or both? And what type of antenna may I use: the 2450AT18A100E from Johanson, the CAN4311881042453K from Yageo or other? Where can I found PCB layout for this design?

Thanks for any help/suggestions.

Regards,

Didier

[Håkon Alseth]

Hi Didier,

Both BALUNs will work with the nRF24AP2, with equal performance when implemented according to the recommendations.

When it comes to antennas, you can choose any chip antenna which is designed for 2.4 GHz. Since antennas are very application specific, in terms of size, placement, etc, it's hard for us to give an recommendation (especially since we use printed quarter wave antennas in all our designs). You have to choose one that fits into your application.

What you will have to add (regardless of antenna choice) is components for tuning the antenna, usually a PI-network: en.wikipedia.org/.../Antenna_tuner

Also, make sure that you follow the chip antenna manufacturers recommendation towards layout and implementation.

Best regards Håkon