Vol. 101

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2021-03-06

Design and Development of Radio Wave Absorber Using Eco-Friendly Materials

By Odampilly Rahul Manohar, Anju Pradeep, and Pezholil Mohanan
Progress In Electromagnetics Research M, Vol. 101, 161-172, 2021
doi:10.2528/PIERM21011402

Abstract

An investigation on using eco-friendly natural materials like coconut pith, rubber and charcoal powder for developing radio wave absorbers has been reported in this paper. Two absorbers named CoR (Combination of Coconut pith powder and natural Rubber latex) and CoRC (Combination of Coconut pith powder, natural Rubber latex and Charcoal powder) are made through proper mixing and drying. The absorptivity of these two absorbers (CoR and CoRC) is compared with the industrial standard polyurethane based absorber. The waveguide method is employed to measure the absorptivity of these absorbers in 3 different frequency bands. Band 1 (1.7-2.6 GHz) includes the mobile communication frequencies of 1.8 GHz and 2.4 GHz. Band 2 (4.9-7.05 GHz) is intended for sub 6 GHz band of 5G as well as WLAN frequencies while band 3 (8.2-12 GHz) is for higher frequencies of radar operation. The exact values of lower and upper frequencies of bands are determined by the physical dimensions of waveguides used. The absorption capability of the absorbers is found to increase as the frequency of operation increases. The CoR absorber has almost 63% average absorptivity in band 3, 56% in band 2 and 21% in band 1. The CoRC absorber has an average of 74% absorptivity in band 3, 63% in band 2 and 24% in band 1.

Citation


Odampilly Rahul Manohar, Anju Pradeep, and Pezholil Mohanan, "Design and Development of Radio Wave Absorber Using Eco-Friendly Materials," Progress In Electromagnetics Research M, Vol. 101, 161-172, 2021.
doi:10.2528/PIERM21011402
http://www.jpier.org/PIERM/pier.php?paper=21011402

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