A novel broadband bandpass frequency-selective surface (FSS) designed for fifth generation (5G) EMI shielding is proposed in this paper. This new design employs the vertical vias into 2-D periodic arrays, and such a single 2.5-D layer of via-based structure demonstrated to produce highly stable angular response up 60° both TE TM polarizations. By cascading two layers FSS able obtain broad passband as well wide out-of-band rejection. Moreover, it has quite sharp band edge between specified...

A low-profile broadband bandpass frequency selective surface (FSS) with two rapid band edges is proposed in this paper for 5G near-field applications. The overall structure consists of three metallic layers, separated by thin substrates a thickness 0.07λ. In addition, some centro-symmetric miniaturized slots are introduced the middle layer to further improve its stability and reduce physical dimensions. corresponding equivalent circuit model (ECM) also better analyze principles FSS. Finally,...

In this article, a novel miniaturized concept named strong-coupled frequency selective surface (SC-FSS) with excellent angular stability is presented. First, conceptual design of SC-FSS introduced, where the resonant frequencies are insensitive to almost all incident angles. A corresponding equivalent circuit model developed interpret operating principle and formulate relevant equations an error 0.2%. Furthermore, ultraminiaturized ultrathin band-stop structure unit cell size λ0/35 thickness...

This paper presents the analysis and design of a miniaturized polarization insensitive metamaterial absorber (MMA) for suppression electromagnetic interference (EMI) at microwave frequency range. The proposed MMA consists periodic array double split ring structures printed on an FR4 substrate with thickness 0.07 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> . simulated results derived from CST indicate that absorption ratio is over...

This article presents a novel toroidal metasurface that is able to support response at almost all incident angles for transverse magnetic (TM) wave the microwave range. A flat band observed from calculated structure where radiation power of highest around 7.51 GHz. high transmission resonant frequency simulated and measured coefficients with different angles, whereas lower rest The resonance sensitivity 0.78 GHz/refraction index unit (RIU) experimentally demonstrated, which very sensitive...

This article presents a novel miniaturized almost all-angle-insensitive strong coupled frequency-selective surface (SC-FSS) with all-polarization-insensitive multiband by introducing the different interlayer coupling patches. Two templates of single passband and dual unit cell less than <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.03\lambda $ </tex-math></inline-formula> are adopted to bring in two...

A novel frequency selective surface structure (FSSs) with high selectivity and excellent angular stability is proposed in this paper. To improve the performance of FSS especially stability, coupling capacitive inductive employed to realize miniaturization structural unit around 0.23λ. Furthermore, enhance passband FSS, a multi-layer adopted form 2nd-order filter. In addition, as bandstop suppression demanded 5G communication, we introduce “Jerusalem cross“ layer ingeniously add LC series...

A novel methodology for synthesising ultra‐miniaturised frequency‐selective structures (FSSs) is proposed. The based on interconnecting the convoluted segments, which are arranged alternately both sides of substrate. Three advantages ultra‐compact unit cell size, independent control filtering performance different polarisations, and promising extension multiband response achieved. To verify this concept, two designed fabricated. first one a single‐band FSS operating at 2.5 GHz, with size...

Due to their subwavelength thickness, light weight and easy fabrication, metasurfaces show obvious advantages over 3D metamaterials. Among this, a new concept so-called digital coding which are described in direct manner by quantized reflection or refraction phases was proposed. This paper proposes scheme achieve simultaneous independent control of phase amplitude responses via reflective metasurface as it would be beneficial for full propagation electromagnetic waves. The deflection the...

A miniaturised low‐profile frequency selective surface structure (FSSs) with highly angular stability is proposed in this Letter. Due to the strong coupling introduced by thin dielectric, designed FSS has a unit size of 0.28 λ , which can be applied millimetre‐wave communication. To better analyse performance, equivalent circuit model (ECM) proposed. Moreover, prototype centre working 30 GHz fabricated and measured verify design. The insertion loss demonstrated &lt;0.12 dB bandwidth 2.5...

An experimentally validated fatigue model is proposed for the effect of mean stress on high-cycle performance preloaded threaded fasteners. The compared with commonly used models by Goodman, Gerber, Morrow, Soderberg, and ASME-Elliptic (ASME B106.1M:1985). Fatigue S-N curves are generated at various levels both commercially available (CA) fasteners (Class 10.9 12.9), as well ultra-high strength (UHS) 14.8, 15.8 16.8). Proposed prediction test data show that high fastener stress, bainite...

Abstract Objective To evaluate the long‐term results of using surgical large‐sized thin split‐thickness skin grafting to treat aplasia cutis congenita ( ACC ) in neonates. Methods This study included 18 neonates with large defects who underwent at our hospital from M arch 2002 N ovember 2011. The size lesion was &gt;10% total body surface area TBSA 16 patients, 7% one patient, and 3% another patient. graft designed be equal or slightly larger than lesion. Results Skin grafts patients were...

Various techniques have been performed for repairing transverse facial clefts. This study aimed to investigate an optimal method Twenty-seven patients from 2008 2017 were evaluated. Their mean age at repair was 6.7 months with a follow-up period of 6 10 years. A using inferior lip-based triangular mucosa flap and superior rectangular vermilion-mucosa designed transposition. The orbicularis oris reconstructed by everting mattress suture. skin sutured linear cutaneous closure single superiorly...

With the increase of operating frequency electronic devices, electromagnetic interference (EMI) radiation in 20 GHz and higher is becoming an increasingly difficult problem to solve, especially integrated circuit (IC) package with heat sink where from chip will leak out through gap between ground plane PCB. In this paper, mechanism range up 40 proposed plenty full-wave simulations using different absorbing materials, which beneficial selection structural parameters suppression radiation....

Abstract Background Congenital melanocytic nevi (CMN), benign pigmented birthmarks caused by the mutation of cells during embryofetal development, can cause aesthetic problem when it is located on face. Surgical managements facial CMN are required both pediatric patients and their parents. management, including excision or staged excision, skin grafting, dermabrasion, tissue expansion multiple re‐expansion combined with flaps transplantation, have been reported previously. However, a...

We report our experience with correction of radially deviated Wassel type III thumb polydactyly. After comprehensive assessments from preoperative radiographs, physical examinations and intraoperative reports, we corrected the metacarpophalangeal joint in 34 cases Opening-wedge osteotomies combining bone graft soft tissue reconstruction were used 28 only six cases. Absorbable sutures instead traditional Kirschner (K)-wires to fix grafts. Patients followed up for 12-78 months (mean 47...

In this paper, a strategy for improving the electromagnetic shielding effectiveness of System-in-Package (SiP) by optimizing distribution grounded bumps is presented, where full-wave simulation applied to obtain radiation under different bump distributions in SiP. The performance package with further analyzed. Then gap between signal and ground plane modeled as rectangular waveguide. Moreover, reason why model changes explained. Finally, paper draws method improve overall package. As result,...

This paper presents a novel 2.5-dimensional (2.5-D) wideband frequency selective surface (FSS) which is designed for Fifth Generation (5G) communication applications. The structure design employs the vertical vias in two-dimensional (2-D) periodic array of gridded square loops (GSL) to make miniaturized and stable. By cascading two layers such 2.5-D arrays, proposed FSS able obtain broad passband as well wide out-of-band rejection. To prove validity this design, corresponding equivalent...

A novel miniaturized metamaterial microwave absorber with quasi-full-angle stability is proposed in this paper, where the meander line and strong coupling between patches are applied to increase angular decrease structure size. The results show that absorption peaks always maintained at 5.2 GHz for TE mode from 0° 80°, TM 40°, while rate of more than 80% both 60°. only 3 mm (about <tex xmlns:mml="http://www.w3.org/1998/Math/MathML"...