Absorption Electromagnetic Waves in X-Band Range Using Barium M-Hexaferrite Dopping Zn Ions and Polyaniline Conductive with Variation of Thickness Coating

Abstract

Since the discovery of hexagonal ferrite or known as hexaferrites, research into the development of these materials related to commercial fields and technology has been very rapid. The use of hexaferite as a magnetic material that can be mass produced has a wide application field. Therefore, the magnetic properties of hexaferrites should be adjusted to meet these applications requirements. In this respect, cation substitution is one of the most effective ways to obtain a suitable material. Double layer coating design with variations in thickness of 1 mm, 2 mm, 3 mm, and 4 mm on Radar Absorbent Material (RAM), with Barium M-Hexaferrite (BaM) BaFe12-xZn xO19 as magnetic material with variations in doping concentration of Zn2+ ions x = 0, 0.3 and 0.9 have been successfully synthesized by the solid state reaction method. Likewise with Polyaniline (PANi) with Dodecylbenzene Sulfonic Acid (DBSA) dopant as a conductive material, it have been successfully synthesized by the polymerization method. Radar absorbing materials (RAM) are characterized using X-Ray Diffraction (XRD), Four Point Probes (FPP), Fourier Transform Infrared (FTIR), Vector Network Analyzer (VNA), and Scanning Electron Microscope (SEM). The results of XRD characterization showed that the largest primary phase was obtained at BaM x= 0.9 which was 96.56%. The increassing of concentration dopping of Zn2+ ions to influence of decreasing the magnetic dipole of magnetic materials and the magnetic properties be come softmagnet materials. The variations in thickness coating radar absorbing materials the influence of absorption of electromagnetic waves occurs optimally, and the increase of thickness coating have coused the value of loss of reflection and widening of the absorption band of the X-Band range (8-12 GHz) increasing. The highest reflection loss and widening of the absorption band value is obtained from coating BaM x = 0.9 with a thickness of 4 mm, which are respectively - 16.29 dB, and 3.78 GHz. So that it can be concluded that the addition of the doping concentration of Zn2+ ions and the dimensions of the layer thickness can increase the absorption ability of RAM material.