Does the copper foil connected to the minus of the power block the wifi signal?

Question

Do it yourself

Hello everyone! I collect the device, small in size and flattened. The top and bottom covers are made of foil textolite, on which part of the circuit is also implemented. 70% of the textolite space is not used and I hooked it all to minus, for grounding. Inside the box there will be a device that will make data transfer via wifi.
So the question is, will such foil block the wifi signal?

Answer 1

The foil will play the role of a reflector, i.e. part of the signal it will reflect. This will not completely close the signal, but the radius of its action will most likely reduce, I do not think that in this case it will significantly reduce.
You can bring the antennas out.

Answer 2

70% of the textolite space is not used

Etch an antenna on it.

Answer 3

In addition to the fact that the foil will act as a reflector (reflector), through which the signal will not pass, interference and diffraction phenomena will also occur between the reflected elements, which will not add to your channel speed at all. I believe that in general you will get a very unfortunate result, although it all depends on the location of the antenna inside the case and the quality of the shielding.
Do as Konstantin Tsvetkov suggested - etch the antenna on a free plane, or if the boards are already ready - you can make an overlay from a new layer of textolite with an antenna. Well, if the thickness does not allow (two layers are not allowed), mill the hole and insert the textolite with the antenna.
In fact, there are a lot of options - it would be TK :)
Yes, and do not forget to take into account the planar antenna pattern.

Answer 4

In a metal box with a volume of a couple of cubic meters, there were two wifi routers. One is fixed, and the second is on a rotary mechanism. This was done in order to transmit data to the moving part of the device. There was a lot of data, and the rotation angles were large, the cable did not live there for a long time in principle. So even in this configuration, sometimes there were "dead spots" where the routers lost contact with each other. Perhaps it was the radiation that knocked them down, but such an effect was sometimes observed. They didn’t have time to figure it out, they fixed it programmatically, so it still works. In general, the moral is that Wi-Fi in an iron box does not work very reliably even inside the box, not to mention going outside.

Answer 5

The foil will effectively act as a reflector only if it is located at a certain distance from the antenna vibrator. This distance is usually 0.2-0.24 of the wavelength and depends on a number of factors, which are determined by the applied model for calculating the parameters of the antenna.