Electronic – Where is the antenna in this remote control board

antennapcbradioremote control

This is a PCB of a (radio?) remote control.

enter image description here

Best Answer

The antenna is the rectangular loop trace at the top edge of the PCB. Transistor Q1 is the oscillator. L1 is probably used to provide DC power to Q1, and C1 and C2 are part of the matching and resonating network.