nrf24l01+, pcb mifa antenna design

Hello guys,

I tried to design a pcb antenna for a nrf24l01+, since my company doesnt allow to buy cheap smd breakout board version from china anymore

The pcb stats of the producer:

  • 2-layer FR4 1.55mm (61.023mil)  thickness, εr = 4.6
  • Copper thickness, 35μm (1.378mil)

What I used:

This results into following desgin block:

The antenna area is clear of any signals aswell as ground on top or bottom layer.

Since I have absolutly zero experience with RF antenna design I would like to have some opinions regarding my design.

Thanks so far,