A fast and efficient multi-dimensional adaptive sampling method (ASM) based on Stoer-Bulirsch (S-B) algorithm for frequency selective surface (FSS) analysis and design is presented in this paper. The multivariate rational function is established according to the functional relation of the scattering parameters with frequency and direction of incident wave, medium parameters and geometry dimensi...

The properties of small finite size FSS for use particularly at long wavelengths are summarised. The intended use is the modification of the EM architecture of buildings at mobile radio frequencies. Introduction: At microwave and millimetre wave frequencies the physical sizes of Frequency Selective arrays are, in virtually all practical applications, large enough for the structures to be adequa...

Microwave absorber are used in Military application, EMI reduction, Antenna pattern shaping, Radar cross reduction. Frequencyselective surfaces have been most commonly used in the radio frequency region of the electromagnetic spectrum and find use in applications as diverse as the aforementioned microwave oven, antenna radomes and modern metamaterials. One of the most important applic ations of...

This paper deals with the theortical investigation on curved FSS with wide band frequency. The FSS structure is designed by projecting some circular patches of same dimension on the dome shaped substrate. Compared to conventional Flat type FSS this design provide more wider band of frequency(7.09 GHz). Theoretical investigations have been done by CADFEKO(suite5.5) Designer® software.

Debye model is used for approximating the frequency dependent complex effective permittivity of composite structures in filter and shielding applications at microwave frequencies. In debye model, desired effectiveness (SE) obtained by determining parameters using trial error method. But this may result wasting time or not converging to an optimum solution. work overcome problem were optimized D...

In order to realize wide-band, high-efficiency and flexible electromagnetic wave absorption, an effective method is the combination of different functional materials. How use make multilayer materials with individual reflection selective transmission characteristics very important. this work, composite absorbing fabrics made a frequency surface (FSS), carbonyl iron coated (CIFs) copper-nickel p...

The present work describes a new approach for the design of Frequency-Selective Surface (FSS) in context frequency filters to increase isolation between two vehicle-borne antennas. A compact FSS based on nested square meandered resonators is optimized multifrequency operation. Furthermore, workflow proposed. In general, measurement low-profile does not correspond simulation through Floquet mode...

This work presents advances on the development of a resonant radiator, obtained as augmentation conventional Impulse Radiating Antenna (IRA) with Frequency Selective Surface (FSS), in L-band. An improved passband-type FSS is by exploring Multiple Split Ring Resonators (MCSRR) unit cells to obtain higher Q-factor radiator. The effects multiband and tunable FSS’s are also studied verified via sim...

In this paper, a novel dual-stopband frequency selective surface (FSS) based on the knitted and strong-coupled structures is proposed. The proposed FSS works stably at frequencies of 2.51 5.06 GHz for both TE TM mode, even when incident angles vary from 0° to 75°. element size thickness structure are λ0/16 λ0/170, respectively, where λ0 represents free-space wavelength. To clarify operating pri...

The transmission line transfer matrix method (TLTMM) is presented for the analysis of multilayer electric structures as frequency selective surfaces (FSS), whereby the reflection, transmission and absorption coefficients, field distribution and power flow may be computed inside and outside of the layers. The TLTMM formulation may be developed for any arbitrary angle of incidence, any polarizati...