What kind of RF can travel through a few mm of metal? | Hacker News

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		digiown 18 hours ago \| parent \| context \| favorite \| on: Ask HN: Why don't form-fitting Faraday iPhone case... What kind of RF can travel through a few mm of metal?

kube-system 18 hours ago [–]

If you blindly “put metal around” an antenna, most of the time, you have just created another antenna!

Go put a phone in a filing cabinet and call it. It will ring.

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