Does The BC127 Antenna Radiate Noise?

IoT Modules
1

Hi

I have designed two PCBs that one of them mounted on another. The top PCB includes BC127 at the top right corner of it and the bottom PCB includes several audio circuits outputting audio to a headphone. I should mention that the audio circuits are independent of the BC127 (BC127 used for communication purposes). The communication is based on BLE.
Problem: when the module powered on and it starts to advertise I hear a ticking noise on my headphone. When it connects to a supervisor device the noise becomes even worse.
When I bring a copper layer near the antenna, it suppresses the noise. Is there anyone that has similar problem? How can I fix it?

2

I have experienced similar issues. Screening the bottom circuit is the only thing that has seemed to help, but this doesnt address the root cause. Have read some posts about bluetooth modules drawing current pulses and thereby imposing noise onto shared power supplies. However, this sounds like radiated noise