Backscatter tags have a limited range of operation due to the large pathloss associated with the two hops involved in backscatter signal propagation. In this work, we propose the use of the multiple antennas on the backscatter tag to enhance the range of a WiFi backscatter tag. We combine the Van Atta Array Retro-Reflective structure with the backscatter concept to demonstrate a 22m operating range for the tag.
