Dual Band Metamaterial Absorber for L and S Band Applications

Introduction: This paper introduces a novel metamaterial absorber designed for, L-band, and S-band applications. Methods: The unit cell features a modified square-shaped double slit resonator printed on a dielectric substrate and supported by a copper layer. The absorber is extremely thin, with a total thickness of just 1.6 mm. It utilizes an FR4 epoxy dielectric substrate (εr = 4.4, tanδ = 0.02) with a thickness of 1.6 mm. Results: The absorption characteristics of the device are analyzed using Ansys HFSS, showing absorption peaks at 3 GHz, and 6.9 GHz for the S and C bands, respectively. The average absorption exceeds 90%, and the MMA structure's symmetric design ensures it remains effective across a broad range of incident angles. Design is manufactured and tested for different thickness and absorber dimensions. Comparative Analysis of simulated and manufactured design is presented in the result part. Conclusions: This makes it well-suited for applications such as aircraft surveillance, satellite navigation and radars.