Pcb Antenna Referance Layouts

[Giovanni]

Have you got any 2.4GHz monopole antenna referance design to use with nrf51822 and johanson balun? thanks for you attention

[Giovanni]

This is another good reason. I think we need to see the final application. if you want to contain space

[Locky]

Understood, but the ST BALF01D3 is fine according to Nordic. But the hand solder part makes sense if you are still prototyping.

[Giovanni]

Ok but where i can find the referance layout for st bal and nrf51822?

[Oleh]

Giovanni, here on on the product page nrf51822 -> download -> tab "Reference Layout". You need to be registered and need to enter productkey which comes with the Dev/Eval kits. Edit: link to pca10031

[Oleh]

also, ST is not cheaper, cheaper would be discrete filter (LC). The use of balun make sense imho only in case you need to reduce space.