ESP32 Forum

Posted: **Wed Feb 23, 2022 2:05 pm**

ESP32_PICO_D4
I use a 1/4L antenna. Do I need an additional balun, or can it be connected directly to the module?
thanks for the information

Posted: **Wed Feb 23, 2022 2:29 pm**

Hi,

You don't need an external balun since you already have one inside the ESP32. You need just to consider the antenna matching circuit.

Posted: **Wed Feb 23, 2022 2:42 pm**

I am using a quarter wave antenna. I believe - it can be connected directly to ESP32_PICO_D4

ESP32_PICO_D4_ext_antenna