In this letter, a multiple-input-multiple-output (MIMO) antenna with wideband performance for 5G smartphones is presented. First, planar inverted-F (PIFA) an inverted-T-shaped open-slot introduced. The proposed PIFA operates wide bandwidth of 78% due to the multimode technology. Then, two such PIFAs are attempted be merged as PIFA-pair, constituting 2 × sub-MIMO similar PIFA-element. Additionally, isolation between PIFA-elements in PIFA-pair higher than 10 dB across broadband. Finally, 4...

In this paper, we presented an ultra-wideband multiple-input multiple-output (MIMO) antenna system with high element-isolation for the application in 5G metal-frame smartphones. We proposed T-shaped and C-shaped slots on metal frame generating four resonances to enhance bandwidth. What's more, introduce modified H-shaped between each antenna-element improve of MIMO system. As a result, has wide bandwidth 58% ranging from 3.3 6 GHz is over 18 dB crossing effective frequency band. Thanks...

A mode reconfigurable dielectric resonator antenna (DRA) to realize radiation pattern reconfiguration is presented for the first time. The DRA composed of two zones: inner zone a solid cylinder fabricated by K9 glass ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\varepsilon _{r} = 6.85$ </tex-math></inline-formula> ) and outer filled with liquid—ethyl acetate 7.1$ ). Both them are put into cylindrical...

A reconfigurable antenna with radiation pattern and polarization reconfiguration capabilities is investigated in this communication. The consists of a central dielectric resonator (DRA) two parasitic DRAs made liquid solution low loss. Utilizing the 'lowing liquid, existing DRA can be changed to produce different patterns. An omnidirectional realized when only radiates, while unidirectional obtained using DRAs. Furthermore, by forming DRAs, which via 'lowing. Based on principle, three...

A novel liquid dielectric resonator antenna with circular polarization (CP) reconfigurability is investigated in this communication. The fluidic for design ethyl acetate ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\varepsilon _{\text {r}} =6.6$ </tex-math></inline-formula> ) which held by a container fabricated 3-D printing technology and excited single probe. To realize the CP reconfigurability,...

In this communication, we introduce a glass dielectric resonator antenna (DRA) incorporating liquid-metal polarizer capable of polarization reconfiguration. The is formed by type alloy composed gallium, indium, and tin. generating three different polarizations: −45° (STATE 1), +45° 2), <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$y$ </tex-math></inline-formula> -axis 3). DRA designed to operate at 2.4...

Abstract The scarcity of fresh water is a pressing issue globally, and solar evaporation technology has emerged as leading method for producing water. However, the preparation evaporators hindered by high costs, complexity, environmental concerns. In this work, evaporator with hierarchical porous structure prepared using simple, low‐cost, environmentally friendly dissolution manufacturing strategy. Excellent photothermal conversion capability salt drainage performance are found owing to its...

In this paper, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$4\times 4 / 8\times 8 10\times 10$ </tex-math></inline-formula> multiple input output (MIMO) antenna systems composed of co-located self-neutralized pairs are proposed to operate at 4.8-5.0 GHz (part N77 band) for the fifth-generation (5G) communication applications. The consist a loop and monopole antenna, co-locating together with compact...

To address the issues of inconvenient fabrication and integration for millimeter-wave (MMW) dielectric resonator antennas (DRAs), a new configuration is proposed. First, with artificial electromagnetic boundaries implemented by introducing band-gap structure along four side-wall certain region on printed circuit board. The bandgap (EBG) constructed using array periodic upside-down mushroom-type unit cells. resonant-mode analysis reveals that proposed DR can support conventional modes dense...

This letter introduces a frequency-reconfigurable dielectric resonator antenna (DRA) with water layer integration. The proposed method is based on the strategy combination of mode reconfiguration and loading. First, frequency band DRA reconfigured between resonant frequencies fundamental <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$TE_{111}^y$</tex-math></inline-formula> quasi-...

In this paper, a dual-band multiple-input and multiple-output (MIMO) antenna with ceramic substrate is designed for the miniaturized application in 5G smartphone. The proposed method of miniaturization different from traditional loading technique. It new which not only associated path extending technique but also combined parasitic sub so that 68% size achieved. prototype fabricated to demonstrate method. simulated measured results indicate MIMO has an excellent performance frequency band...

This letter presents a dual-band dielectric resonator antenna (DRA) with large frequency ratio at millimeter-wave band. A of 2.36 is formed by the TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">111</sub> mode and xmlns:xlink="http://www.w3.org/1999/xlink">131</sub> working 16 38 GHz, respectively. These two modes DRA are excited microstrip-fed slot. 1 × 4 array then constructed to achieve high gain in range. In addition, this design also...

Dynamic relaxations play an important role in understanding the nature of glass. The conventional methods to explore dynamic rely on measurement mechanical and thermic properties, while new that may provide a perspective probe relaxation are desperately required. Here, we show β-relaxation metallic glasses (MGs) can be unveiled by electrical resistivity (ER). Irreversible leads increment resistivity, which fitted Kohlrausch–Williams–Watts equation well. In contrast, ER results initialized...

A single-layered dual-frequency Vivaldi antenna system with a large frequency ratio covering microwave and millimeter-wave bands is presented in this communication. The consists of enhanced gain two four-element arrays, which cover the ranges 3.5–7 GHz 26.5–40 GHz, respectively. designed dual-function tapered slots etched on microwave-band aperture, acts as radiator for millimeter-waveband, parasitic structure enhancement band. Each array element excited by corresponding port separately, so...

A circularly-polarized-reconfigurable patch antenna based on fluidic control method is proposed in this paper. liquid dielectric, ethyl acetate, introduced to change the substrate of a from homogeneous inhomogeneous. Two orthogonal fundamental transverse magnetic (TM) modes are excited with 90° phase difference order produce circularly polarized (CP) radiation. Then, polarization switchable between left-hand circular (LHCP) and right-hand (RHCP) through injection dielectric different...

Emerging advanced technologies (EAT) have been regarded as significant technological innovations which can greatly improve the transforming construction industry. Given that research on EAT related to management of prefabricated (MPC) has not yet conducted, various researchers require a state-of-the-art summary and implementation in MPC field. The purpose this paper is provide systematic literature review by analysing selected 526 publications peer-reviewed leading journals during 2009–2020....

A modified slotted microstrip patch sensor antenna has been developed for sensitivity enhancement to measure the moisture content of leaves. The design incorporates a rectangular slot positioned above feed antenna. achieves resonant frequency at lower range than operating traditional without while maintaining miniaturized form factor. To evaluate proposed antenna, variation in and reflection coefficient (S11) is observed with sample under test (SUT), i.e., leaf placed patch. comparative...

A rectangle‐shaped aperture antenna for ultra‐wideband (UWB) applications which can prevent the interference problems is presented. By attaching a hollow‐cross‐loop resonator (HCLR), triple‐notched frequency bands centred at 3.5, 5.7 and 8.2 GHz are obtained. The HCLR loaded in over microstrip feedline. proposed has been successfully simulated measured. Based on results, it shown that yields an impedance bandwidth of 2.55–12 with voltage standing wave ratio (VSWR) &lt; 2, except 3.15–3.85...

Building information Modeling (BIM) has been applied to the whole life cycle planning of construction projects, becoming latest “engineering brain”. Currently, researches on BIM involve various stages, but most review fields are relatively single and lack systematic analysis. In order comprehensively analyze research trend in field engineering management, this paper takes holistic analysis method as framework. first stage, 2066 projects were quantitatively analyzed by bibliometrics clarify...

This paper proposes a compact dual-polarized cross-dipole antenna with low-pass filtering radiation response. The consists of two pairs orthogonally placed cross-dipoles, circular patch, balun and folded ground plane. Shape the dipoles installation patch are designed collaboratively to realize wideband high efficiency in size. balun, which also contributes resonance, simultaneously realizes response at wide stop-band low loss passband, simple structure. For demonstration, proposed is...

In this communication, we introduce a p-i-n-diode-based polarizer integrated with dielectric resonator antenna (DRA) to realize polarization reconfigurability. The is found be effective in altering the electromagnetic-field distribution of DRA, such that DRA can actively changed. Unlike conventional reconfigurable antennas, proposed active would not degrade radiation performance DRA. way, retains high efficiency its simple excitation. uses and agile-switching mechanism provide three...