What is the type of
2.4G pcb built-in antenna, L=120mm ?
There is nothing on the dataset.
Is it a microstrip patch antenna?
Can anyone enlighten me?
What is the type of
I'm confused about which antenna you are referring to. The Argon contains a 2.4 GHz chip antenna on the device itself for BLE only. There is also a U.FL connector to use an external BLE antenna.
For Wi-Fi, the antenna is an external 2.4 GHz trace antenna. The Particle part number is ANT-FLXV2 the datasheet has other information about it.