[willis936]

Microwave-ovens definitely don't leak below 2.4 GHz. Any frequency above that is a non-issue for microwave-oven operator safety. It also wouldn't be an issue for any communication device transmitting below 2.4 GHz. If you want to shut down 5 GHz communication then a microwave-oven would be leaky. 60 GHz: it shouldn't matter since it needs LoS anyway.

Also, remember to ground your faraday cages.

[formerly_proven]

The width of the area around microwave doors looks suspiciously close to lambda/4 for 2.4 GHz (~3 cm) on pretty much every microwave I've ever seen - I'd almost be surprised if that construction isn't tuned to reflect 2.4 GHz, which would make it a very leaky container at say 0.9/1.8 GHz.

[willis936]

I think you should double-check the harmonics that would get passed relative to a quarter-wave mesh.

[Johnythree]

Yes, microwave ovens use a tuned slot to seal the door. It's basically a half-wave stub.

[posix_me_less]

> ground your faraday cages.

Why?

[hobs]

I assume for the same reason you ground your home, building up charges is a great way for Bad Things to happen.

[posix_me_less]

Why would a phone pouch/box build up great charge? You don't ground your home because of charge buildup either - grounding is there to decrease the chance a thunderbolt will run through precious things, like house walls, people, electric wiring etc.

[hobs]

You absolutely want to ground your home due to charge buildup, I have seen the exploded appliances, no lightning required.

[oasisbob]

Grounding and bonding is done for many safety reasons. Reducing stray voltage is certainly one of them:

https://www.mikeholt.com/technical-stray-voltage-newsletter-...

[willis936]

Better performance. Faraday cages can act as reradiators at frequencies dependent on cage geometry.