Die cast shielding

[Tantalum]

Hello

I wanted to understand how such shielding actually works.
https://youtu.be/EY0acWrCYjw?t=754

Since the aluminum plate are connected to the ground a little bit everywhere on the PCB, how is it possible that it doesn't create ground loops???

Thanks

[The Soulman]

Hello

I wanted to understand how such shielding actually works.
https://youtu.be/EY0acWrCYjw?t=754

Since the aluminum plate are connected to the ground a little bit everywhere on the PCB, how is it possible that it doesn't create ground loops???

Thanks

There are some ground loops but because of the short physical distance and the thickness of the shield parasitic properties are slim to none.
I.E, there isn't much capacitance, inductance or resistance between any given two points.