An Improved Biodegradable Microwave Absorber Based on Peanut Shell Mixed with Metal Free Carbon Nanotube for Ku-Band

Abstract

Abstract Agriculture waste has been used to develop environment friendly microwave and pyramidal absorbers, based on their dielectric constant value, for anechoic chambers applications. This paper conferred the dielectric parameters and microwave absorption profile based on two samples, one of peanut shell (PS) and second of PS mixed with 1 wt% metal free multi-walled carbon nanotubes (MF-MWCNT) composite (PSCNT)for frequency range 12 GHz to 18 GHz (Ku-band).The measured reflectivity for sample 2 of PSCNT is found to be -16.92 dB and − 28.36 dB as compared to sample1 of PS as -8.35dB and − 12.46 dB at13.3 GHz and 15.76 GHz, respectively. The finding shows the PSCNT composite has improved microwave absorption and good absorptivity in the Ku-band. The results indicate that it can replace the existing agriculture based microwave absorber.