How wifi signal pass through aluminium cover

sorry, but you are incorrect. Youre confusing faraday cage RF attenuation with RF blocking.

Aluminum CAN and does act as a UHF reflector however, and can turn any wifi antenna into a directional YAGI

that however is not signal blocking.

Transverse EM waves out of the wifi antenna either at 2.4Ghz or 5Ghz are not 'blocked'. However none of this is relevant to a discussion on the Macbook Air.

You can output 5watts of UHF thru 10 feet of solid lead with 360 degrees coverage, much less aluminum foil.

That video was using a flimsy and junky Trifield meter.

Cell phones and wifi are putting out, depending on signal and device, in the range of 30mw to 200+mw

Everything depends on

1. power output

2. antenna geometry,

3. reflector and drivers for the signal

4. frequency of output

3. L.O.S. attenuation

and a few other factors.

All this talk of tinfoil is, .......... 😉

Magic! Mine has always worked superbly!

Cheers,

GB

The antenna is behind the black plastic strip at the hinge point.

danialf wrote:

I have read everywhere that aluminum blocks the wifi signal and RFA radiation

Youve been reading nonsense then on that topic then 😊

Even IF the wifi antenna wasnt under the plastic hinge cover, RF transverse EM waves pass thru all things.

the only matter is signal attenuation.

As a HAM radio operator, I can tell you that there are exotic radios that actually transmit completely thru the Earth to the other side (for science experimentation etc.)

Cool to know! I kind of like the magic idea (as an engineer, you are probably familiar with FEM....) 🙂

But it is good to know where the antenna is!

Thanks!

GB

PV - attenuation....you should know better. No big words allowed!!! 😁

Even I (an English major long ago) had to look it up. Of course, I look up words probably 20 or 30 times a day on some days, so maybe not so surprising?

But, you do get 5 stars for the word of the day! Thanks for adding to my vocabulary! 😍

GB