Hello this is my first time making rf circuit and i would like to get feedback on this circuit with nrf54l15.
I used Texas_SWRA117D 2.4GHz IFA antenna.
Calculated impedance with inner 1 layer's gnd
Top layer
Inner1
Inner 2
Bottom
Hello this is my first time making rf circuit and i would like to get feedback on this circuit with nrf54l15.
I used Texas_SWRA117D 2.4GHz IFA antenna.
Calculated impedance with inner 1 layer's gnd
Top layer
Inner1
Inner 2
Bottom
Hi,
Below are my comments:
* For top layer, add ground vias along the edge of PCB. Also around the matching network components you need have ground vias for better grounding and return path (green dots in below picture). Also the first shunt capacitor that goes to chip GND pin needs to be connected to center ground pad as well:
* For nRF54L15 QFN package, we recommend to have Prepreg value to be max 100 um. Make sure to not exceed that limit. It is to make sure harmonics radiations are under control.
* Add a lot more GND vias for general grounding and other components. Usually using more vias is better than less even if they look unnecessary.
* The reference design files and also Nordic DK design files are publicly available for new designs. You can also check them if have not seen them before:
https://nsscprodmedia.blob.core.windows.net/prod/software-and-other-downloads/reference-layouts/nrf54l15/nrf54l15-qfaa-reference-layout-0_8.zip
