Design and Development of Multiband Intelligent Surfaces

The multiband reflective metasurface proposes a unit cell design using multiple Split Ring Resonators (SRRs) that resonate at 8, 10, and 12 GHz. The proposed design employs an F4BMX220 substrate with a thickness of 1.5 mm as the dielectric substrate, featuring multiple SRRs on the top layer and a full ground plane on the bottom layer. The results show that the S11 magnitude is 0.94 at 8 GHz, 0.72 at 10 GHz, and 0.81 at 12 GHz, with the S21 magnitude being 0. The reflection phase is -32.2° at 8 GHz, -29.1° at 10 GHz, and -3.34° at 12 GHz. Overall, the results indicate good performance, with reflected power exceeding 50% at all desired frequencies.