Characterization of EM Wave Absorber Configured by Axially Symmetrical C-Shaped Planar Structure

This paper deals with the characterization of electromagnetics (EM) wave absorber configured by axially symmetrical C-shaped planar structure. The proposed absorber which is intended to work at C-band frequency with the center frequency of 5.8GHz is designed on a 0.8mm thick FR4 epoxy dielectric substrate. A unit cell of axially symmetrical C-shaped structure is configured with proper boundary conditions to form a double periodic array planar structure of absorber in infinite extent Some physical parameters of unit cell are investigated to evaluate the performance of proposed EM wave absorber in terms of bandwidth characteristic and frequency response. The characterization results show that the resonator length of axially symmetrical C-shaped planar structure affects significantly the frequency response of the absorber with the widest bandwidth achievement of 80MHz.