Inkjet printed intelligent reflecting surface for indoor applications

A passive, low‐cost, paper‐based intelligent reflecting surface (IRS) is designed to reflect a signal in a desired direction to overcome non‐line‐of‐sight scenarios in indoor environments. The IRS is fabricated using conductive silver ink printed on paper with a specific nanoparticle arrangement, yielding a cost‐effective paper‐based IRS that can easily be mass‐produced. Full‐wave numerical simulation results were consistent with measurement results, demonstrating the IRS's ability to reflect incident waves into a desired nonspecular direction based on the inkjet‐printed design and materials. An on‐paper inexpensive inkjet‐printed intelligent reflecting surface to reflecting a waveform in a desired direction. The device provides an effective way to overcome non‐line‐of‐sight scenarios in indoor situation. Test results demonstrated its ability to reflect signal into a desired non‐specular direction based on angle of incidence of the incoming wave.