In reconfigurable frequency selective surface, FSS, bias lines can suppress a resonant frequency. This is disadvantage, as it reduces FSS potential application. this paper, procedure to recover the suppressed described. A based on four arms star geometry considered and its reconfigurability achieved by use of varactors, for which x polarization resonance. So, dipoles are added unit cell recover...

The aim of this paper is to study a Novel shaped Compact Frequency Selective Surface in wireless dualband applications as a band reject filter. Two resonating frequencies are obtained at 3.2 GHz and 10.45 GHz in this proposed FSS which cover S band and X band respectively. The FSS is designed by cutting slits and slots in the 22mm x 22mm squareshaped patch keeping same periodicity (24mm x 24mm)...

Abstract In this letter, we present a new frequency selective surface (FSS) for shielding 2.4–2.5 and 4.98–5.825 GHz wireless local area network (WLAN) bands. This FSS structure is based on the traditional Sierpinski octagon improve it. Compared with structure, improved one has smaller element size better angular stability. The design realized float glass relative permittivity () of 8, unit cel...

A millimeter-wave (mm-wave) antenna with enhanced gain for new 5G networks is introduced in this work. rectangular slot operating at the fundamental mode of desired frequency band utilized study. The improved by employing a Frequency Selective Surface (FSS). FSS-based reflectors are designed same and added under specific distance to achieve required enhancement suitable dimension 25 × 5 ...

We study the radar cross section (RCS) property of an aircraft considering electromagnetic (EM) characteristics a frequency selective surface (FSS) radome, mounted on aircraft. Instead full-wave methods, we utilize high-frequency such as shooting and bouncing rays (SBR), physical theory diffraction (PTD), flat model, taking significant computational efficiency. Based developed algorithm, analyz...

Calcific aortic valve disease (CAVD) is an active process presumably triggered by interplays between cardiovascular risk factors, molecular signaling networks and hemodynamic cues. While earlier studies demonstrated that alterations in fluid shear stress (FSS) on the fibrosa could trigger inflammation, the mechanisms of CAVD pathogenesis secondary to side-specific FSS abnormalities are poorly u...

A novel mechanically tunable frequency selective surface (FSS) based on a sliding 3D-printed inserted dielectric is presented in this paper. This paper first introduces the working mechanism of FSS, which indicates that variable capacitance key to tunability. Based this, we design an all-metal bandpass FSS with certain thickness and matching cross-shaped dielectric. By changing insertion depth ...

The thermochromic nature of vanadium dioxide (VO2) has facilitated many promising applications for reconfigurable frequency selectivity. phase-changing property VO2 was used to realise a frequency-selective surface (FSS) capable manipulating electromagnetic waves different functionalities. Diffractive optical elements (DOE) are diffracting laser beams form conductive FSS images on the wafer dip...

Here we made an attempt to maximize the gain of microstrip patch antenna. To achieve this we used microstrip circular patch antenna at 5.8 GHz frequency ISM Band Application. Single FSS (frequency selective surface) substrate is used to increase efficiency. Parameters are set accordingly and results of microstrip patch antenna with FSS layer and microstrip patch antenna without substrate later ...

In this work, computationally efficient design optimization of frequency selective surface (FSS)-loaded ultra-wideband Vivaldi antenna via the use data-driven surrogate model is studied. The proposed methodology consists a multi-layer FSS structure aimed for performance improvement design, which makes multi-objective multi-dimensional problem. For having fast and accurate process, alongside met...