Efficient Application of Electromagnetic Technique with Dielectric and Magnetic Materials for the Development of Broadband Microwave Absorber

Nowadays, with the advancements in technology, electromagnetic (EM) radiation emanating from electronic and wireless devices is becoming a major concern. In this regard, the demand for an efficient absorber is increasing. Currently, the reported absorbers have narrow bandwidth and large thickness. However, obtaining the broadband response with the compactness of the structure is still a challenging task. Therefore, this paper has attempted to solve the problem of the development of broadband microwave absorbers by developing dielectric and magnetic materials with the application of the electromagnetic (EM) technique. The proposed design involves simple hydrothermal and ball milling methods for the preparation of materials. Further, multilayering technique was also used to obtain the broadband response with the advantage of having less thickness. The result provides 98.83% of fractional bandwidth of the double-layer absorber which is quite acceptable at 2.2 mm thickness. This compact absorber with optimized dimensions can be potentially utilized for stealth applications.