Idea of RFID Signal Icon
This is a logo with a small filled in circle in the very center. To the left and to the right of this circle are three sets of lines, each a bit longer than the one before it closest to the circle. These lines curl to wrap around the circle.
This RFID Signal icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.