امین قادی

In this paper, a one-dimensional absorptive multilayer photonic-crystal structure has been designed and simulated using the physical theory of diffraction (PTD), transmission line modeling (TLM), and the transfer matrix method (TMM) in order to less visible fighter planes from radar signals. The periodic structure is comprised of Quartz glasses as dielectric materials and a particular kind of magnetic cobalt ferrite nanocomposite known as synthesized Co0.9Fe2.1O4 at 200 ◦C whose optical data was extracted from experimental work. Totally, the results illustrated a high absorption rate at the angles of incidence from 0◦ to 90◦ for TM and TE polarizations about 80 % and 51 % without any sublayer on average within X-band radar frequency from 8 GHz to 12 GHz. More significantly, the electric field profile and magnetic field distribution showed that this structure attenuated electromagnetic field along propagation vector integrally as well as reflected power is negligible up to about 21 % across all components of the field respectively. Manufacturing tolerance calculations have been carried out to consider production errors practically as an engineering technique to increase the performance of such photonic-crystal composition in the industry. In this designation, the device also is protected from environmental impacts by dielectric materials.