New types composite copper (Cu) and activated carbon (C) for electromagnetic wave absorber materials

Abstract

Carbon copper (CuC) as an electromagnetic wave absorber has been designed by compaction method. The XRD characterization was performed to determine the size of the crystal, FTIR to determine the chemical bond and Vector Network Analyzer was determined the absorption of electromagnetic waves (return loss) and the voltage standing wave ratio (VSWR) at 100 kHz-8GHz. The XDR data shows the smallest crystal size value of ± 2θ = 74.200 with spectrum had recorded in the wavelength range at 4000 cm−1 to 500 cm−1 that indicated the bond type of absorber. Characterization ofVNA shows maximum RL absorption of -25.05 dB at frequency 5.26 GHz with a thickness of absorber on 3 mm. The RL value had influenced by the concentration of activated carbon (AC) and the temperature of the heating process. Spectrum RL at 5 GHz - 6 GHz frequency has an excellent RL absorption frequency and the best value of VSWR at 1.13. This experiment shows activating carbon CuC is a good material to designed absorber which has VSWR approximating value at 1 that indicates the input power transmitted almost entirely into the air and only a small part reflected.

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