One-Dimensional Radiation Beam Tilting Using Thin Planner Phase Gradient Metasurfaces Array Lens at millimeter-Wave Band for 5G Applications

In this paper, a thin planner metasurface (MS) lens technique is reported to deflect the radiation beam in predetermined direction at mm-Wave band for 5G applications. The MS lens array consists of phase gradient unit cells which capable to manipulates the phase of the incoming wave and transformed into the tilted beam. The unit cell has a square ring resonator and cross bar slots. The gradient phase is achieved by controlling the length of the square ring resonator slot. The total phase variation by tuning the length of the resonator is achieved 217
⁰
at 28 GHz. To check the authenticity of tilted radiation beam, the phase gradient metasurfaces (PGMS) array lens is fed by a conventional microstrip patch antenna. The patch antenna covers 27.5 – 28.5 GHz band with realized gain of 7.9 dBi at 28 GHz. The MS lens is loaded in the main radiation beam direction of the patch antenna i.e., at the top side. With this, the radiation beam is tilting ≈ 21
⁰
from the original radiation beam direction. Moreover, the MS array confined the radiation beam as a result the gain of the patch antenna is significantly increased about 2.17 dBi at 28 GHz.