There are various types of WiFi extender. The best solution for me has been a dual band AC2600 MESH system. Previous WiFi extenders that I tried were flaky as they wanted to connect using the 2.4Ghz channel. By contrast, my BT WholeHome Disc system is rock steady and uses the less cluttered and not interference prone 5 Ghz channel.
However, it takes three powered discs for the signal to leapfrog and reach my outdoor observatory (converted garage) . The primary disc is connected to my original router in my lounge. The second disc is 24 feet distant from that in my conservatory. The third Is 15 feet beyond that in my observatory. The signal has to navigate through a 4.5" brick wall and plasterboard insulation between each. It took me a while to work out exactly where best to locate these. Logic says make them equidistant apart, but the obstructions were highly material, hence the unequal distances.
That nearest to my scope (conservatory disc) now has a -51 dBm signal and that in my observatory is -58 dBm, both in an "excellent" range. If I remove the conservatory disc (hence my observatory then connects to disc1 in my lounge and my scope to observatory disk) , then the signal strength in my observatory will drop to an almost unusable -80 dBm. This highlights how an extra disc in a MESH system MIGHT be necessary as brick walls and like obstructions are challenging. My scope (with mini-PC) is then roughly equidistant from both conservatory and observatory discs (around 20 feet from each). The 'Mesh' effect of that makes such connectivity very reliable, indeed, zero drop outs. I now enjoy download speeds exceeding 50 Mbps and Upload at 15 Mbps (both limited by my older fibre broadband). Plenty fast enough for my 4K UHD end to end EAA system. Devices might be rated faster, but you will always be limited by your inherent limits of your broader network unless strictly peer to peer.
Edited by Noah4x4, 16 January 2021 - 07:28 AM.