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The smartphone, as a media device, should offer a large-size screen and fastdata rates in a well-packed device. Emergent 5G technologies based onmillimeter waves need efficiently radiating antennas integrated into deviceswhose bodies (especially glass screens) behave as waveguides in the antennafrequency bands. Using the concept of retroreflective surfaces, this workproposes a compact metasurface located below the smartphone glass screen whichreduces surface-wave excitation and propagation, and significantly improves theradiation pattern and efficiency of millimeter-wave antennas integrated intomobile terminals.

Metasurface Retroreflector for Controlling Parasitic Surface Waves on Bodies of 5G Mobile Phones