A dual-polarized hybrid eight-antenna array operating in the 2.6-GHz band (2550-2650 MHz) for 5G communication multi-input multi-output (MIMO) operation smartphone is presented. The proposed antenna elements are symmetrically placed along long edges of smartphone, and they composed two different four-antenna types (C-shaped coupled-fed L-shaped monopole slot) that exhibit orthogonal polarization. Therefore, coupling between can be reduced, MIMO system performances enhanced. prototype...

A simple direct-fed dual-loop antenna capable of providing hepta-band WWAN/LTE operation under surroundings an unbroken metal rim in smartphone applications is proposed. The greatest highlight this proposed that it provides a and effective multiband solution for metal-rimmed smartphone. with 5 mm height embraces the system circuit board 130 × 70 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . Two no-ground portions 10 are set on top...

A novel eight-band LTE/WWAN frequency reconfigurable antenna for tablet computer applications is proposed in this communication. With a small dimension of 40 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\,\times\,$</tex> </formula> 12 Notation="TeX">$\,\times \,$</tex> 4 Notation="TeX">${\rm mm}^{3}$</tex> , the comprises loop feeding strip and shorting which single-pole four-throw RF switch...

Terahertz generation from liquid, in particular water, was long considered impossible, because of strong absorption. While terahertz radiation liquid water finally observed 2017, the mechanism has remained unclear, and efficiency low. Here experiments show that when a column flowing is used, can be enhanced by three orders magnitude---as high as for typical two-color air plasma source, yet using single-color laser pump here. The authors explain with model current induced ponderomotive force,...

A planar antenna array, which is closely placed with an infinitesimal distance of only 4 mm between array elements yet well decoupled by a deliberately designed small-size protruded ground, presented. The well-designed ground has two types behaviors: reducing the coupling in and improving impedance matching to enhance bandwidth. At lower bands GSM850/900 upper GSM1800/1900/UMTS/LTE2300/2500, good radiation efficiencies better than 43% 50% respectively are obtained, simultaneously isolations...

A small-size low-profile narrow-frame antenna for seven-band WWAN/LTE operations in the internal smartphone applications is proposed. The greatest highlight of this proposed that its narrow edge has a width only 5 mm, which very novel applications. Meanwhile, small size × 40 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> and low profile 3 above circuit board, makes it promising slim capable covering GSM850/900/DCS/PCS/UMTS...

A hybrid multi-mode narrow-frame antenna for WWAN/LTE metal-rimmed smartphone applications is proposed in this paper. The ground clearance only 5 mm × 45 mm, which promising smartphones. metal rim with a small gap connected to the system by three grounded patches. This can excite coupled-loop modes and one slot mode. By incorporating these four modes, provide coverage GSM850/900, DCS/PCS/UMTS2100, LTE2300/2500 operations. Detailed design considerations of are described, both experimental...

Abstract Identifying influential nodes in complex networks is always an important research direction network science because it may attribute to understand the function and structure of controlling propagation process. However, most extant studies tend over-rely on topology, thus ignoring dynamic information interactions within network. In this paper, we propose a node importance identification algorithm based neighborhood multi order attribute(MOMA). Its core idea use space location feature...

With the recent rapid improvement of wireless communication rates <xref ref-type="bibr" rid="ref1" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">[1]</xref> , rid="ref2" xmlns:xlink="http://www.w3.org/1999/xlink">[2]</xref> cutoff frequency semiconductor devices has gradually increased rid="ref3" xmlns:xlink="http://www.w3.org/1999/xlink">[3]</xref> rid="ref4" xmlns:xlink="http://www.w3.org/1999/xlink">[4]</xref> and products with large signal...

A fully scalable and SPICE compatible wideband model of on-chip interconnects valid up to 110 GHz is presented in this paper. The series branches the proposed multisegment consist an RL ladder network capture skin proximity effects, as well substrate effect. Their values are obtained from a technique based on modified effective loop inductance approach complex image method. CG used shunt model, which accounts for capacitive coupling through oxide loss due electrical field, impact dummy metal...

A compact four-port multiple input output (MIMO) antenna system is proposed operating in C-band at 3.5 GHz (3400 ~ 3600) for future fifth generation 5G technology mobile broadband services. The MIMO consist of an Inverted-L(IL)shape monopole on the edges non-ground portion 9×9 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> with substrate FR-4 and ground plane dimensions 136×68 . size realized by using IL-shape shorted stripe slot...

This letter presents the design of a Q-band on-chip antenna with broadband characteristic using standard 0.18- μm CMOS silicon-on-insulator process. A pair switches is introduced in this to implement frequency reconfigurability, order enhance bandwidth antenna. small-signal equivalent circuit switch illustrated letter, and an optimized gate width transistor selected achieve tradeoff between gain proposed By changing state switches, measured -10-dB from 29.5 51.0 GHz achieved by antenna,...

Based on several extended formulas to determine all frequency-and temperature-dependent distributed parameters of on-chip coupled asymmetrical and symmetrical interconnects silicon substrates, the electromagnetic-thermal characteristics were investigated in detail, including 1) wideband series impedances shunt conductances, 2) conductive dielectric attenuation constants even(c) odd (pi)-mode, 3) pulse waveform distortion crosstalk, 4) average power handling capability (APHC). In these...

This work proposed a compact multiple-input multiple-output (MIMO) antenna system having four antennas each fed by coplanar waveguide (CPW) operating for 3.5GHz band (3400–3600) MHz. The MIMO is realized with two groups of printed Inverted L-monopole size 5×4 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> placed orthogonally to other attain the diversity capability polarization and pattern at edge non-ground portion 15 × mobile...

A V-band high gain and efficiency on-chip antenna in a CMOS 0.18-μm process is presented this work. High resistivity silicon substrate, dielectric resonator layer of off-chip ground are used design to enhance the reduce size. The proposed achieves maximum 8 dBi with -10 dB bandwidth 4 GHz. peak 96.7% half-power-beamwidth 72° 92° E-and H-plane respectively. Moreover, chip size 700 μm × 1250 μm.

This paper presents the design of a V-band hybrid integrated high-gain antenna. antenna is designed to meet system-on-chip applications in quad flat no-lead (QFN) package. The consists an on-chip loop radiator, dielectric resonator (DR), and off-chip ground plane. radiator fabricated excite DR using standard 0.18-μm CMOS technology with high-resistivity (HR) silicon substrate. realized by simplified QFN die pad. Several advantages this structure are discussed paper. impact on performance...

For preserving the Grotto wall paintings and protecting these historic cultural icons from damage deterioration in nature environment, a visual analytics framework set of tools are proposed for discovery degradation patterns. In comparison with traditional analysis methods that used restricted scales, our method provides users multi-scale analytic support to study problems on site, cave, particular area through application multidimensional visualization techniques. Several case studies have...

Abstract THz wave has been increasingly applied in engineering practice. One of its outstanding advantages is the penetrability through certain optically opaque materials, whose interior properties could be therefore obtained. In this report, we develop an experimental method to determine plane stress state materials based on stress-optical law using terahertz time-domain spectroscopy (THz-TDS). method, two polarizers are combined into conventional THz-TDS system sense and adjust...

The present paper reports on the combined influence of chirp characteristics pump pulses and spatially periodic density (density ripple) plasma, terahertz (THz) radiation generation, by beating two chirped pulses. lasers exert a nonlinear ponderomotive force along z-direction. A self-consistent field is generated due to oscillations plasma electrons; as result these linear forces electrons attain an oscillatory velocity that couples with ripple generate stronger transient transverse current,...

Terahertz wave has been used to obtain the internal information of materials due its penetrability optically opaque materials. In this paper, we propose a full-field stress measuring method using terahertz time-domain spectroscopy. The theoretical model was established based on stress-optical law, and then validated experimentally. A four-point bending experiment conducted determine coefficient specimen material, after which proposed measure distribution diametrically loaded disk....

Integrated energy microgrids and shared storage have significant benefits in improving the utilization of system, which is gradually becoming current research hotspot. And uncertainty new output also significantly affects stable economic operation integrated microgrid. So how to establish a set optimization model considering photovoltaic (PV) an urgent problem be solved nowadays. Firstly, this paper introduces framework system microgrid containing operator (ESO), analyzes scheduling method...