A wideband, ultra-thin, wide-angle and polarization-insensitive metamaterial absorber with a single-layer resistive frequency selective surface (FSS) is proposed. The simulated results show that the absorption rate of greater than 90% in range 24.1–42.6 GHz, relative bandwidth up to 55.47%. thickness structure 1.2 mm, which 0.088 ? 0.156 for lowest highest frequencies, respectively. power loss ...

The electronic structure of the Fe-based superconductor Ba(0.6)K(0.4)Fe(2)As(2) is studied by means of angle-resolved photoemission. We identify dispersive bands crossing the Fermi level forming hole-like (electron-like) Fermi surfaces (FSs) around Γ (M) with nearly nested FS pockets connected by the antiferromagnetic wavevector. Compared to band structure calculation findings, the overall band...

PURPOSE To estimate the frequency and strength of fatigue in epilepsy patients. METHODS The MEDLINE, EMBASE, COCHRANE, Web of Science, and SCOPUS databases were searched, and hand-searched data were added. For inclusion, the studies had to be original research articles that included fatigue data from adult epilepsy patients. The strength was estimated using studies reporting fatigue scores of...

Conventional plasma absorbers are challenging to obtain high electron density and sizeable spatial scale for effective absorption while meeting the applied requirements of low profile power consumption. Although frequency selective surface (FSS) has proved realize a lower absorber with some empirical patterns adequately, issue FSS design matching dispersion distribution complicated plasmas is s...

Surrogate modeling has become an important tool in the design of high-frequency structures. Although full-wave electromagnetic (EM) simulation tools provide accurate account for circuit characteristics and performance, they entail considerable computational expenditures. Replacing EM analysis by fast surrogates provides a way to accelerate procedures. Unfortunately, microwave passives is challe...

Due to the global growth in popularity of Fifth Generation (5G) cellular communications, demand for shielding against it has risen a variety applications, mainly related cybersecurity but also isolation, calm areas and so on. This research paper aims provide suitable dual-band fractal FSS (Frequency Selective Surface) 5G lower band frequencies: 750 MHz 3.5 GHz. The unit cell is shape bow tie, w...

A design of high-gain Fabry-Perot cavity (FPC) antenna is presented with non-uniform frequency selective surface (FSS) superstrate and electromagnetic band gap (EBG) reflecting ground. The FSS EBG ground are utilized to flexibly control the attenuation constant $...

This paper presents reconfigurable frequency and polarization FSS-based with photoconductive switches in a single dual-band operation for antenna applications at the terahertz band. The band FSS unit-cell element exhibits reconfigurability between 0.62 0.7 THz. It also converts LP waves into CP over ranging from 0.59 to 0.8 THz (30% 3-dB BW). (0.42 1.03 THz) when are turned ON (0.51 0.865 OFF. ...

In this paper, a high gain and directional coplanar waveguide (CPW)-fed ultra-wideband (UWB) planar antenna with new frequency selective surface (FSS) unit cells design is proposed for UWB applications. The was designed based on the Mercedes artistic-shaped (MAP) antenna. consisted of circular ring embedded three straight legs impedance bandwidth improvement. modelled FSS used integration two p...

A miniaturized frequency selective rasorber (FSR) with high selectivity passband and wideband absorption properties is presented. Its performance as an absorber over a wide band from 8.08 to 18.08 GHz through the structure of metal incurved square loop loaded resistors. The surface (FSS) using Jerusalem cross array metallic patch realizes transmission 2.7 3.52 GHz. And insertion loss (IL) 0.37 ...