Search results for: Hantao Xu

Items from 1 to 19 out of 19 results

article

Scanning Electrochemical Probe Lithography for Ultra‐Precision Machining of Micro‐Optical Elements with Freeform Curved Surface

Hantao Xu, Lianhuan Han, Jianan Huang, Bingqian Du, more

Small > 20 > 43 > n/a - n/a

Two challenges should be overcome for the ultra‐precision machining of micro‐optical element with freeform curved surface: one is the intricate geometry, the other is the hard‐to‐machining optical materials due to their hardness, brittleness or flexibility. Here scanning electrochemical probe lithography (SECPL) is developed, not only to meet the machining need of intricate geometry by 3D direct writing,...

article

A Highly Stable and Non‐Flammable Deep Eutectic Electrolyte for High‐Performance Lithium Metal Batteries

Li Zhao, Ao Xu, Yu Cheng, Hantao Xu, more

Angewandte Chemie International Edition > 63 > 43 > n/a - n/a

Deep eutectic electrolytes (DEEs) are regarded as one of the next‐generation electrolytes to promote the development of lithium metal batteries (LMBs) due to their unparalleled advantages compared to both liquid electrolytes and solid electrolytes. However, its application in LMBs is limited by electrode interface compatibility. Here, we introduce a novel solid dimethylmalononitrile (DMMN)‐based DEE...

article

A Highly Stable and Non‐Flammable Deep Eutectic Electrolyte for High‐Performance Lithium Metal Batteries

Li Zhao, Ao Xu, Yu Cheng, Hantao Xu, more

Angewandte Chemie > 136 > 43 > n/a - n/a

article

Molecule Crowding Strategy in Polymer Electrolytes Inducing Stable Interfaces for All‐Solid‐State Lithium Batteries

Hong Zhang, Jiahui Deng, Hantao Xu, Haoran Xu, more

Advanced Materials > 36 > 31 > n/a - n/a

All‐solid‐state lithium batteries with polymer electrolytes suffer from electrolyte decomposition and lithium dendrites because of the unstable electrode/electrolyte interfaces. Herein, a molecule crowding strategy is proposed to modulate the Li⁺ coordinated structure, thus in situ constructing the stable interfaces. Since 15‐crown‐5 possesses superior compatibility with polymer and electrostatic...

article

The Role of the Molecular Encapsulation Effect in Stabilizing Hydrogen‐Bond‐Rich Gel‐State Lithium Metal Batteries

Hantao Xu, Wei Deng, Lei Shi, Juncai Long, more

Angewandte Chemie International Edition > 63 > 27 > n/a - n/a

Gel‐state polymer electrolytes with superior mechanical properties, self‐healing abilities and high Li⁺ transference numbers can be obtained by in situ polymerization of monomers with hydrogen‐bonding moieties. However, it is overlooked that the active hydrogen atoms in hydrogen‐bond donors experience displacement reactions with lithium metal in lithium metal batteries (LMBs), leading to corrosion...

article

The Role of the Molecular Encapsulation Effect in Stabilizing Hydrogen‐Bond‐Rich Gel‐State Lithium Metal Batteries

Hantao Xu, Wei Deng, Lei Shi, Juncai Long, more

Angewandte Chemie > 136 > 27 > n/a - n/a

article

Self‐Assembled Tent‐Like Nanocavities for Space‐Confined Stable Lithium Metal Anode

Nannan Zhang, Lulu Du, Jianyong Zhang, Hantao Xu, more

Advanced Functional Materials > 33 > 16 > n/a - n/a

Lithium metal is considered as a promising anode for its high energy density and low redox potential. However, dendrite growth and electrolyte‐lithium reaction lead to poor cycling stability of lithium anodes. Herein, a space‐confined strategy is proposed to realize stable Li metal anode by constructing a nonplanar interface with flexible tent‐like nanocavities. The tent‐like interface is achieved...

article

A hybrid substrate integrated waveguide and spoof surface plasmon polariton leaky‐wave antenna with open stopband suppressed

Shen‐Da Xu, Li Liu, Dong‐Fang Guan, Ren‐Tang Hong, more

International Journal of RF and Microwave Computer‐Aided Engineering > 32 > 11 > n/a - n/a

In this paper, an asymmetric sinusoidal modulated substrate integrated waveguide‐spoof surface plasmon polariton (SIW‐SSPP) leaky‐wave antenna with open stopband suppressed is proposed. The SSPP transmission line can covert the guided waves to the leaky‐wave radiations with frequency‐scanning properties due to the sinusoidal modulation. Using asymmetric model is an effective method to restrain the...

article

A narrow‐band circularly polarized leaky‐wave antenna with open stopband suppressed

Shen‐Da Xu, Dong‐Fang Guan, Li Liu, Qingfeng Zhang, more

International Journal of RF and Microwave Computer‐Aided Engineering > 31 > 7 > n/a - n/a

In this paper, a narrow‐band circularly polarized (CP) microstrip leaky‐wave antenna (LWA) with open stopband suppressed is proposed. Coupled meandered slow‐wave lines are adopted to realize narrow‐band beam scanning. The asymmetric elements are employed as radiators to realize CP and zero‐crossing scanning. We modulated the antenna by loading the ground inductance and asymmetric capacitors on the...

article

Carbon fiber paper supported interlayer space enlarged Ni2Fe-LDHs improved OER electrocatalytic activity

Haihong Zhong, Xiaokang Cheng, Hantao Xu, Lin Li, more

Electrochimica Acta > 2017 > 258 > C > 554-560

Herein, a series of three-dimensional Ni₂Fe-SDS-LDH/CFP non-precious metal electrocatalysts in a simple hydrothermal route using sodium dodecyl sulfonate (SDS) as an interlayer spacer agent, and carbon fiber paper (CFP) as a conductive substrate was tailored. The electrocatalytic performance towards oxygen evolution reaction (OER) in alkaline medium was investigated. The results demonstrate that the...

article

An Architectural Scheme for Real-Time Multiple Users Beam Tracking Systems

Hantao Xu, Hadi Aliakbarian, Ewald Van der Westhuizen, Riaan Wolhuter, more

IEEE Systems Journal > 2017 > 11 > 4 > 2905 - 2916

In this paper, the design, building, and functioning of a complete communication system with 16 antenna elements, software-defined radio, and beam-tracking capabilities for up to four users is reported. Since the design uses components off the shelf, it is relatively low cost, which makes it feasible to be used in high-volume commercial applications. A key feature is that all digital beamforming and...

article

A Dual-Band Cavity Antenna Embedded Within Multiple Metallic Enclosures

Ping Jack Soh, Sen Yan, Hantao Xu, Guy A. E. Vandenbosch

IEEE Transactions on Antennas and Propagation > 2016 > 64 > 5 > 1587 - 1594

This work describes the design and evaluation of an antenna to be embedded within multiple metallic cavity like structures of quite arbitrary shape. The design is based on an open substrate-integrated waveguide (SIW) implemented with RO 4003 substrate, aiming to miniature the cavity and suited for fabrication with printed-circuit board (PCB) technology. A pair of vias is used to tune the resonances...

chapter

Tracking more targets with less antenna: An investigation into the co-array concept

Jiachen Wang, Hantao Xu, Xuezhi Zheng, Guy A. E. Vandenbosch

2015 9th European Conference on Antennas and Propagation (EuCAP) > 1 - 4

2015 9th European Conference on Antennas and Propagation (EuCAP)

In this paper, two compressive DoA estimation algorithms are investigated, namely the sparse ruler, and the coprime sampling array. These algorithms explore the eigen matrix structure of a non uniform linear array in order to artificially synthesize a larger uniform linear array, in this way boosting the capability of a DoA tracking system beyond the theoretical limit of the number of sources that...

article

Off-the-Shelf Low-Cost Target Tracking Architecture for Wireless Communications

Hantao Xu, Hadi Aliakbarian, Guy A. E. Vandenbosch

IEEE Systems Journal > 2015 > 9 > 1 > 13 - 21

A compact architecture for real-time directions-of-arrival estimation, tracking, and beamforming is presented. It is based on the phased-array concept. Beamforming is digitally realized. The system concept and architecture are described in full detail. A proof of concept prototype, including a 1

$\times$

2 planar array, an analog front end, and an field programmable gate array (FPGA) -based embedded...

chapter

Microstrip-based all-textile unidirectional UWB antenna with full ground plane

Purna B. Samal, Ping Jack Soh, Hantao Xu, Guy A. E. Vandenbosch

The 8th European Conference on Antennas and Propagation (EuCAP 2014) > 1408 - 1412

2014 8th European Conference on Antennas and Propagation (EuCAP)

A design overview for a microstrip antenna topology operating within the full UWB band is described. Existing broadbanding concepts have been creatively combined throughout this design to enable the UWB behavior, while simultaneously keeping the full ground plane intact. This is crucial in maintaining worn antenna performance. It successfully reduces any on-body performance degradation, resulting...

chapter

Hardware acceleration of MUSIC based DoA estimator in MUBTS

Jing Yan, Yangqing Huang, Hantao Xu, Guy A. E Vandenbosch

The 8th European Conference on Antennas and Propagation (EuCAP 2014) > 2561 - 2565

2014 8th European Conference on Antennas and Propagation (EuCAP)

This paper presents a hardware implementation of a MUSIC based DoA estimator in a practical Multiple Users Beam Tracker System (MUBTS). The robustness and accuracy of the algorithm was first checked in a much more flexible software implementation on a PC. The hardware version involves a fixed point hardware implementation in an FPGA processor, which is then integrated into the original MUBTS as a...

article

Implementation of a Project-Based Telecommunications Engineering Design Course

Hadi Aliakbarian, Ping Jack Soh, Saeed Farsi, Hantao Xu, more

IEEE Transactions on Education > 2014 > 57 > 1 > 25 - 33

<?Pub Dtl?>This paper describes and discusses the implementation of a project-based graduate design course in telecommunications engineering. This course, which requires a combination of technical and soft skills for its completion, enables guided independent learning (GIL) and application of technical knowledge acquired from classroom learning. Its main implementation challenge is the need...

article

A Smart Wearable Textile Array System for Biomedical Telemetry Applications

Ping Jack Soh, Bertold Van den Bergh, Hantao Xu, Hadi Aliakbarian, more

IEEE Transactions on Microwave Theory and Techniques > 2013 > 61 > 5-2 > 2253 - 2261

<?Pub Dtl?>A smart wearable textile array system (SWTAS) with direction of arrival (DoA) estimation and beamforming is proposed and developed for biomedical telemetry applications. This conformal system enables effective and continuous patient monitoring when combined with one or more health sensors, as information about the subject's health condition is received adaptively to guarantee link...

article

Simple Technique to Predict Beam Direction Based on Element Pattern and Array Factor in Small- and Medium-Sized Arrays

Hadi Aliakbarian, Hantao Xu, Guy A. E. Vandenbosch

IEEE Antennas and Wireless Propagation Letters > 2012 > 11 > 763 - 766

It is well known that, in an array, the actual beam direction differs from the beam direction of the array factor. This is an issue coming up especially when studying beam steering in small- and medium-sized arrays. There, the effect may be considerable. It seriously affects the electronics taking care of the steering. This letter derives a simple relation between the actual beam direction and the...

Filter options

Publication date

Last 3 months (3)
Last year (6)
Last 3 years (8)

Close

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

From:

To:
Set your own date range

INFONA - science communication portal

Search results for: Hantao Xu

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options