检索结果-内蒙古大学图书馆

Asia-Pacific Conference on Microwave

作者： M. Idrees Magray Saou-Wen Su Peng-Hao Juan Jui-Han Lu Antenna Design Department Advanced EM and Wireless Communication R&D R&D Center ASUSTek Computer Inc Taipei Taiwan Department of Electronic Communication Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan

A compact 5G mmWave antenna-in-package (AiP) with a low-profile 5-layered substrate is proposed in this conference paper. A very thin liquid crystal polymer (LCP) substrate topology is utilized with an overall thickness of 0.5 mm (around $0.05\lambda_{\mathbfr}$ at 28 GHz) only. The proposed antenna is dual-polarized and with a shorted patch radiator and a magnetic dipole radiator, which respectively contribute to the horizontal polarization (H-pol) and the vertical polarization (V-pol). For H-pol, the shorted patch radiator is excited by aperture coupled feeding via dual slots present in the ground plane. Additionally, two resonant $TM_{1/2,0,0}^{z}$ and $TM_{1,0,0}^{z}$ modes are excited in the patch that aids in the wideband coverage. For V-pol, the microstrip magnetic dipole radiator is fed by the coaxial feedline and loaded with a reflector behind the dipole to improve the front-to-back ratio. Both the orthogonal antenna ports cover the n257 5G mmWave frequency band (26.5-29.5 GHz). An optimal peak gain of more than 7.5 dBi is achieved for both antenna ports.

关键词：

来源：评论

学校读者我要写书评

暂无评论

dynamic microstructure evolution and mechanical properties of dilute Mg-Al-Ca-Mn alloy during hot rolling

引用

Journal of Materials Science & Technology 2022年第34期129卷 1-14页

作者： Shiwei Xu Congcong Zhu Zhanhong Lin Chen Jin S.Kamado K.Oh-ishi Yun Qin College of Materials Science and Engineering Hunan UniversityChangsha 410082China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China Qinghai Salt Lake Teli Magnesium Co.Ltd. Xining 810000China Department of Mechanical Engineering Nagaoka University of TechnologyNagaoka 940-2188Japan Toyota Central R&D Labs. Inc.41-1 YokomichiNagakuteAichi 480-1192Japan Research Institute(R&D Centre) Baowu Steel Group CorporationShanghai 201900China

The dynamic microstructure and texture of dilute Mg-0.50Al-0.71Ca-0.33Mn(wt.%) during hot rolling at two slab temperatures were investigated by electron backscattered diffraction(EBSd) and high resolution transmission electron microscopy(HrTEM). The results show that the development of the rolling microstructures is to first form {10–12} extension twins in the original grains, thereby forming the extension-twinned regions, and then to further form {10–11}-{10–12} double twins and kinks in the extension-twinned regions, and finally to form continuous dynamic recrystallized(continuous drXed)grains in the double twins and the cross parts of the shear-deformed coarse extension-twinned *** extension twins, double twins and kinks show a decisive effect on the formation of rolling *** number of {10–11}-{10–12} double twins and resultant the continuous drX process are strongly affected by the rolling slab temperature and the reduction thickness per pass. By optimizing the rolling conditions, texture and microstructures of the multi-pass rolled Mg-Al-Ca-Mn alloy sheets are successfully modified. Although the total alloy content is only 1.5 wt.%, these Mg-Al-Ca-Mn alloy sheets show much higher strength than the commercial Mg-3Al-1 Zn(wt.%)(AZ31B) sheet.

关键词： Mg-Al-Ca-Mn alloy Hot rolling dynamic recrystallization Texture control Mechanical properties

来源：评论

学校读者我要写书评

暂无评论

Low-Profile, Conjoined and decoupled 2.4/5/6-GHz Laptop Antennas

Low-Profile, Conjoined and Decoupled 2.4/5/6-GHz Laptop Ante...

引用

Asia-Pacific Conference on Microwave

作者： Saou-Wen Su Peng-Hao Juan Antenna Design Department Advanced EM & Wireless Communication R&D Center ASUSTek Computer Inc. Taiwan

ISBN: (数字)9784902339567

ISBN: (纸本)9781665451086

A low-profile, conjoined and decoupled two-unit antenna design for Wi-Fi 6E laptops is introduced. The single monopole unit has a small size of 4 mm × 18.7 mm and comprises a branched monopole with two shorting inductors for producing the 5 GHz (5150–5825 MHz) and 6 GHz (5925–7125 MHz) bands, and an inductor loaded at one branch end and connecting to a tuning portion for 2.4 GHz (2400–2484 MHz) operation. Two symmetrical units are further conjoined by a chip inductor that connects the ends of the tuning portions, forming into a compact footprint of 4 mm × 38.4 mm for the two-unit laptop design. With the use of the decoupling inductor and proper two-unit monopole arrangement, acceptable isolation and low envelop correlation coefficient (ECC) can be attained.

关键词： Microwave antennas Couplings Correlation coefficient Portable computers Inductors Tuning Wireless fidelity

来源：评论

学校读者我要写书评

暂无评论

Ultra-Wideband Wi-Fi 6E/5G Nr Antenna for Laptop Applications

Ultra-Wideband Wi-Fi 6E/5G NR Antenna for Laptop Application...

引用

Asia-Pacific Conference on Microwave

作者： derry Permana Yusuf Fang-Hsien Chu Saou-Wen Su Antenna Design Department Advanced EM & Wireless Communication R&D Center ASUSTek Computer Inc. Taiwan

ISBN: (数字)9784902339567

ISBN: (纸本)9781665451086

A printed, ultra-wideband, laptop monopole antenna functioning in heterogeneous networks for Wi-Fi 6E and 5G Nr operation is presented. The antenna design occupies a compact size of 7 mm × 17 mm and comprises a branched monopole, an inverted-L shorting strip, and a small parasitic strip. The branched monopole is obtained from inserting a T-shaped slit in a near-rectangular radiating patch to form two resonant branch strips. The monopole is further shorted on the bottom-right corner via the inverted-L shorting strip. With the proposed design structure, the multiple resonant modes can be excited to cover the 2.4 GHz (2400–2484 MHz), 5 GHz (5150–5825 MHz), and the new 6 GHz (5925–7125 MHz) bands for Wi-Fi 6E operation and also the 5G Nr sub-6 GHz bands 77/78/79 (3.3-5.0 GHz). In addition, a very wide operating band, ranging from about 3.2 to 11 GHz, is also achieved. The proposed antenna is promising for Wi-Fi 6E and 5G Nr laptop applications.

关键词： Microwave antennas Portable computers 5G mobile communication Ultra wideband antennas Heterogeneous networks distance measurement Wireless fidelity

来源：评论

学校读者我要写书评

暂无评论

Metamaterial-Inspired Antenna for Wi-Fi 7 Operation in Wireless Local Area Network Bands

Metamaterial-Inspired Antenna for Wi-Fi 7 Operation in Wirel...

引用

Asia-Pacific Conference on Microwave

作者： Saou-Wen Su M. Idrees Magray Jui-Han Lu Antenna Design Department Advanced EM & Wireless Comm R&D Center ASUSTek Computer Inc Taipei Taiwan Department of Electronic Communication Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan

A metamaterial-inspired antenna is proposed that utilizes an artificial mu-negative (MNG) transmission line (TL) to incorporate the zeroth-order resonance (ZOr) into WiFi 7 operation in the 2.4/5/6 GHz wireless local area network (WLAN) bands. The antenna comprises a meta-structured loop with periodically loaded series interdigital capacitors and a parasitic shorted strip, all formed on the same substrate layer in a coplanar structure. The 2.4 and 6 GHz WLAN bands are produced by the parasitic strip and the close-form loop strip, respectively, which are of typical right-handed antennas. The 5 GHz band caused by the ZOr mode, where the permeability is zero, can be adjusted by the series capacitance in the unit cell. The total antenna size is 5.4 mm $\times 19.6$ mm only. In this work, the design applied to notebook computers for the upcoming Wi-Fi 7 operation is also demonstrated. Both numerical and experimental results validate our proof-of-concept design.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Compact, Hybrid Slot-dipole-Monopole Wi-Fi 7 Antenna for Slim-Bezel Notebook Applications

Compact, Hybrid Slot-Dipole-Monopole Wi-Fi 7 Antenna for Sli...

引用

Asia-Pacific Conference on Microwave

作者： M. Idrees Magray Saou-Wen Su Jui-Han Lu Antenna Design Department Advanced EM & Wireless Comm R&D Center ASUSTek Computer Inc Taipei Taiwan Department of Electronic Communication Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan

A hybrid slot-dipole-monopole antenna is demonstrated that is suitable for Wi-Fi 7 notebook applications. The design consists of an open slot, a coupled strip resonator, and a T-shaped feed, created on the two layers of the substrate. The open slot is able to operate in the 2.4 GHz (2400-2484 MHz) wireless local area network (WLAN) band. The coupled strip resonator and the T-shape feed together generate two resonant dipole-monopole modes that cover the 5 GHz (5150-5825 MHz) and 6 GHz (5925-7125 MHz) WLAN bands respectively. The design is simple in structure and occupies a compact size of $4.6 \mathrm{~mm} \times 15 \mathrm{~mm}$ (approximately $0.037 \lambda \times 0.120 \lambda$ at 2.4 GHz), which can find practical applications in slim-bezel notebook computers.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optically Transparent Metasurface-Based Wideband Antenna for mmWave 5G Mobile devices

Optically Transparent Metasurface-Based Wideband Antenna for...

引用

Asia-Pacific Conference on Microwave

作者： M. Idrees Magray Saou-Wen Su Antenna Design Department Advanced EM & Wireless Communication R&D Center ASUSTek Computer Inc. Taipei Taiwan

ISBN: (数字)9784902339567

ISBN: (纸本)9781665451086

An optically transparent metasurface-based patch antenna for mm Wave 5G mobile applications is proposed in this paper. The proposed design consists of three layers, in which the bottom layer containing a primary radiator, the microstrip patch, is accommodated inside the 5G device. The remaining layers are optically transparent in nature and integrated on the display of the device. This way the overall physical dimensions of the design can be reduced. The optically transparent metasurface is located above the patch antenna such that a wide operating bandwidth for the patch can be obtained. The motivation behind the design of the proposed mm Wave 5G antenna is to reduce the overall size without a compromise on antenna characteristics. The proposed design is of a wideband and has a fractional bandwidth of around 15%, covering the 5G Nr257 frequency band. Also, an optimal peak gain of more than 8 dBi is observed at 28 GHz.

关键词： Integrated optics 5G mobile communication Patch antennas Metasurfaces Mobile handsets Topology Millimeter wave communication

来源：评论

学校读者我要写书评

暂无评论

Conformal and Highly Compact Wi-Fi 6E Antenna for Laptop Applications

Conformal and Highly Compact Wi-Fi 6E Antenna for Laptop App...

引用

Asia-Pacific Conference on Microwave

作者： M. Idrees Magray Saou-Wen Su Antenna Design Department Advanced EM & Wireless Communication R&D Center ASUSTek Computer Inc. Taipei Taiwan

ISBN: (数字)9784902339567

ISBN: (纸本)9781665451086

A conformal and yet highly compact Wi-Fi 6E antenna is proposed for laptop applications. A planar topology is first utilized that is later conformed for achieving highly compact antenna structure. The conformal antenna geometry occupies a minimal area of $\boldsymbol{9.5\times 4.7}$ mm 2 . A thin Fr4 substrate of thickness 0.2 mm is used to achieve conformity. The antenna consists of a meandered monopole strip capacitively coupled for exciting the $\boldsymbol{\lambda/4}$ resonant mode in the 2.4 GHz band. A rectangular loop is also connected to the monopole strip for the excitation of the $\boldsymbol{\lambda/2}$ loop resonant mode in the 5 GHz band. The L-shaped coupling trace produces the $\boldsymbol{\lambda/4}$ monopole resonant mode in 6 GHz band. The antenna may be the first conformal design for laptops.

关键词： Microwave antennas Geometry Couplings Portable computers resonant frequency Topology Wireless fidelity

来源：评论

学校读者我要写书评

暂无评论

Mechanical Properties and Thermal Shock resistance of SrAl_(2)Si_(2)O_(8) reinforced BN Ceramic Composites

引用

无机材料学报 2024年第10期39卷 1182-1188页

作者： WANG Bo CAI delong ZHU Qishuai LI daxin YANG Zhihua dUAN Xiaoming LI Yanan WANG Xuan JIA dechang ZHOU Yu International Joint Laboratory of Advanced Nanomaterials of Heilongjiang Province College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Key Laboratory of Advanced Structural-Functional Integration Materials School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China China Resources Cement Technology R&D Co. LtdGuangzhou 510000China The First Military Representative Office of the Army Equipment Department in Beijing Beijing 100072China The Fourth System Design Department Fourth AcademyChina Aerospace Science and Industry Corporation LimitedBeijing 100048China School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

Hexagonal boron nitride(h-BN)ceramics have become exceptional materials for heat-resistant components in hypersonic vehicles,owing to their superior thermal stability and excellent dielectric ***,their densification during sintering still poses challenges for researchers,and their mechanical properties are rather *** this study,SrAl_(2)Si_(2)O_(8)(SAS),with low melting point and high strength,was introduced into the h-BN ceramics to facilitate the sintering and reinforce the strength and ***,BN-SAS ceramic composites were fabricated via hot press sintering using h-BN,SrCO_(3),Al_(2)O_(3),and SiO_(2) as raw materials,and effects of sintering pressure on their microstructure,mechanical property,and thermal property were *** thermal shock resistance of BN-SAS ceramic composites was *** show that phases of as-preparedBN-SAS ceramic composites are h-BN and h-SrAl_(2)Si_(2)O_(8).With the increase of sintering pressure,the composites’densities increase,and the mechanical properties shew a rising trend followed by a slight *** a sintering pressure of 20 MPa,their bending strength and fracture toughness are(138±4)MPa and(1.84±0.05)MPa·m^(1/2),*** sintered at 10 MPa exhibit a low coefficient of thermal expansion,with an average of 2.96×10^(-6) K^(-1) in the temperature range from 200 to 1200℃.The BN-SAS ceramic composites prepared at 20 MPa display higher thermal conductivity from 12.42 to 28.42 W·m^(-1)·K^(-1) within the temperature range from room temperature to 1000℃.Notably,BN-SAS composites exhibit remarkable thermal shock resistance,with residual bending strength peaking and subsequently declining sharply under a thermal shock temperature difference ranging from 600 to 1400℃.The maximum residual bending strength is recorded at a temperature difference of 800℃,with a residual strength retention rate of 101%.As the thermal shock temperature difference increase,the degree of oxida

关键词： BN matrix composite hot-press sintering mechanical property thermal shock resistance service reliability

来源：评论

学校读者我要写书评

暂无评论

Characterization of γ′ Precipitation Behavior in Additively Manufactured IN738LC Superalloy via In-Situ Small-Angle Neutron Scattering 10th

Characterization of γ′ Precipitation Behavior in Additivel...

引用

10th International Symposium on Superalloy 718 and derivatives, 2023

作者： Qin, Hailong Chi, Hai Tao, Ying Xie, Mingzhao Shi, Songyi Yu, Hongyao Xie, Jinli Tan, Qing Bi, Zhongnan Beijing Key Laboratory of Advanced High Temperature Materials Central Iron & Steel Research Institute Beijing100081 China Beijing GAONA Materials & Technology Co. LTD Beijing100081 China University of Science and Technology Beijing Beijing100083 China Department of Microstructure Physics and Alloy Design Max-Planck-Institut Für Eisenforschung GmbH Max-Planck-Straße 1 Düsseldorf40237 Germany

ISBN: (纸本)9783031274466

In the present study, quantitative evaluation of the size and volume fraction of γ′ particles have been studied by Small-Angle Neutron Scattering (SANS) and FE-SEM in additively manufactured IN738LC Superalloy employing isothermal heat treatment conditions at 850 ℃. The results show that there is no observable γ′ precipitation in the as-deposited alloy, while a large number of small cellular and striated sub-structures can be characterized with widths ranging from 0.5 to 1.5 μm. during the 850 ℃ isothermal heat treatment, the γ′ phase rapidly precipitates in large quantities and shows a unimodal irregular sphere-like shape. The average size of the γ′ particles increases with longer aging times. After 10 min of isothermal heat treatment the average γ′ particle size is 72.5 nm. This average size increase to 137.3 nm after 120 min of ageing. However, the volume fraction (VF) of γ′ precipitates does not change after 10 min of isothermal heat treatment time, at which point the VF % reaches about 40%. This result varies significantly from IN738LC that was prepared by traditional casting processes. © 2023, The Minerals, Metals & Materials Society.

关键词： Volume fraction

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：