If you were to take a circle and then surround it with two more concentric circles and then take the top 25% the same way you would take 25% of a pizza, then you have this image. It's the classic wi-fi symbol.
Related to Wi-Fi Icon
Related icons are the icons with matching tags, as well as all network icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors