Shielding an NRF24l01+PA

[signal15]

Someone had a tutorial on how to shield them to improve reliability and range. It involved wrapping the board with something non-conductive like tape or plastic wrap, and then wrapping tin foil over it making sure it didn't touch anything it shouldn't.

I've done this to mine, but, I have a question on grounding. The tutorial did not ground the shield. But, it's my understanding that shielding really only works when it's grounded. Can anyone confirm or deny this?

[Oitzu]

@signal15 probably talking about http://blog.blackoise.de/2016/02/fixing-your-cheap-nrf24l01-palna-module/?
I've not written it, but the foil touches the ground on the antenna socket. So yes, it needs to be grounded.

In most cases it even works ungrounded though. Even a ungrounded shield has an effect on the circuit.