This review focuses on two systems, nanocrystalline Zn substituted Co1-xZnxFe2O4 (0≤x≥1) and Ni0.4Zn0.2Mn0.4Fe2O4, were synthesized using microwave hydrothermal and auto-combustion method respectively. The synthesized powders were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), thermo-gravimetricdifferential thermal analysis (TG-DTA) and FTIR. The average parti...

ARTICLE HISTORY: Received 19 November 2015 Revised 22 December 2015 Accepted 27 December 2015 The Radar Cross Section of a target plays an important role in the detection of targets by radars . This paper presents a new method to predict the bistatic and monostatic RCS of coated electrically large objects. The bodies can be covered by lossy electric and/or magnetic Radar Absorbing Materials (RA...

This book chapter is based on the experimental activities conducted mainly at Sapienza University of Rome: Astronautic, Electric and Energetic Engineering Department in collaboration with University of Maryland, Institute for Research in Electronics and Applied Physics (IREAP). A branch of scientific research about composite materials is focused on electromagnetic characterization and subsequen...

Radar, which is an electronic and electromagnetic system that works with the use of radio waves to detect locate objects, has led need for radar absorber materials some military applications, especially defence security. In this study, barium hexaferrite copper powders were used investigate a absorbing composite material. Barium synthesized by Sol-Gel method. added polyurethane resin at differe...

Acoustical parameters of porous materials give the necessary and important information for noise control engineers. Profound knowledge their physical characteristics enable an effective sound absorber material design. The theory of sound-absorbing materials has progressed considerably during the last decade. A noise control engineer with serious interest in sound absorbing technology is advised...

In this paper, a novel method of partial coating to reduce the Radar Cross Section (RCS) of a complex shaped perfectly electrically conducting (PEC) aircraft, of electrically large size, is proposed. The physical optics (PO) method is used to identify the hot spots of the PEC aircraft. An empirical procedure is then proposed to coat partial contiguous areas with Radar Absorbent Material (RAM). ...