ESP32 Forum

Hello,

We’re designing a circuit for a ESP32-S3 SoC and we would like to use a trace antenna. We’re using your reference circuit to design the RF part.

For this we need to define the values of the capacitors and inductors of the antenna and we’re wondering if you have a specific guide for the design and component selection? Do you have and documentation on how to determine the value of L1, L2, C1,C2 and C5 (see picture). And can you please tell which values you use in the ESP32-­S3­-WROOM­-1 module?

Cheers,

Not a HW guy and I'm certainly not well-versed in RF magic, but I do know those are impedance matching network components and as such are dependent on the antenna, PCB material and PCB layout that you use. I think you'd normally use a VNA on the final product to tweak those.