ESP32 PCB Antenna Design

[DurandA]

I'm a bit late to the party. Thanks to Espressif for the antenna design and to @Prasad for the KiCad footprint.

JLCPCB SMT service can now assemble ESP32-PICO-D4 so I am looking to replace modules with the ESP32 SiP to automate assembly of a few personal projects.

I don't have experience with antenna/RF design but saw that most designs include a matching circuit consisting of inductors/capacitors to tune the antenna as on the picture below:

antenna-matching_small.png (63.28 KiB) Viewed 3259 times

Are there some rules of thumb to pick the right values when using the Espressif antenna design which will be "good enough" in most cases? Or do we have to go through the whole antenna design process and buy an expensive VNA?

[mahyar1284]

Sorry, we didn't have any KiCAD libraries. Add dxf file of Antenna Type-B, and hope this would be helpful for you.
Thanks.

Has anyone tested this antenna design on esp32 ?

[rkumararora]

Hi Stone,

Thank you for the DXF file. Indeed it helps. Also Angus mentioned to measure the dimensions through Gerber viewer using generated Gerber files in the reference files. Heres reverent thread,

viewtopic.php?f=12&t=344&p=34523#p34523

Thank you,
P .

Hi,
These dimensions in DXF file are not matching with the ESP32 WROOM module antenna gerber.