Resistive FSS based Radar Absorbing Structure for Broadband Applications

With rapid advancements in the field of target detection technologies, there is increased demand for radar absorbing materials with superior power absorption characteristics. However, the development of broadband, structurally stable and lightweight absorber which would function in the entire range of 2 GHz-18 GHz is still a herculean task. Resistive frequency selective surface (FSS) based absorbers present an efficient class of radar absorbing structures (RAS) where both ohmic losses as well as dielectric losses contribute towards achieving broadband absorption performance at reduced thickness. In this regard, the present paper proposes multi-layered RAS based on resistive FSS for broadband applications. Full wave simulation results clearly indicate that the percentage of power absorbed is greater than 90% over a broadband frequency range (2GHz to 22 GHz).