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In this paper, we propose a via-less fully screen-printed reconfigurableintelligent surface which can establish a second line-of-sight communicationfrom 23.5GHz to 29.5GHz. By serially connecting the H shaped resonator alongthe H field of the incident wave, we minimize the effect of the biasing linesand make a via-less design, which reduces the fabrication difficulty and cost.The unit-cell simulation of the array with screen-printed VO2 switches shows a215{\deg} to 160{\deg} phase shift difference between the ON and OFF stateswithin bandwidth. During the field testing of the ideal arrays, we verify thatthe array can redirect the 45{\deg} incident wave to 0{\deg} reflection with asignal enhancement of at least 10 dB as compared to the array which has allunit cells in the OFF condition.

A Via-less Fully Screen-Printed Reconfigurable Intelligent Surface for 5G Millimeter Wave Communication