Results 31 to 40 of about 726,451 (313)

High‐Precision Direction‐of‐Arrival Estimations Using Digital Programmable Metasurface

Advanced Intelligent Systems, 2022
Commonly, phased array antennas are used to provide spatial resolution for direction of arrival (DOA) estimations. However, the phase‐array‐based DOA estimations usually require complicated system architecture and signal processing.
Jia Wei Wang, Zi Ai Huang, Qiang Xiao, Wei Han Li, Bai Yang Li, Xiang Wan, Tie Jun Cui   +6 more
doaj   +1 more source

Implications of polarization impurity on diversity for 5G networks

, 2016
Millimeter-waves offer the possibility of high data rate for wireless communications. With fifth generation (5G) system designers looking to combine satellite and terrestrial signals at the mobile handset, we consider the beneficial impact, using ...
Nicholas P. Lawrence, Abbott, D., Derek Abbott, Hedley J. Hansen, Lawrence, N.P., Hansen, H.J.   +5 more
core   +1 more source

A Low-Profile and Wide-Angle Scanning Planar Ultrawideband Modular Antenna With Ultra-Thin Loading Window

IEEE Access, 2022
Ultrawideband phased antenna array has been widely used in communications, radars and detection. However, the high profile and poor wide-angle scanning characteristics have always been the critical limitation for many available ultrawideband antenna ...
Xin Quan, Zhenxin Cao, Huaimin Zhou, Shengchi Zhu   +3 more
doaj   +1 more source

Beam deflection lens at terahertz frequencies using a hole lattice metamaterial [PDF]

, 2013
The design and simulation of a dielectric lens for beam deflection in the terahertz range is presented. The device consists of a lattice of sub-wavelength holes in a rectangular dielectric slab, and by varying the radii of the holes with respect to ...
Webb, M., Abbott, D., Headland, D., Withayachumnankul, W.   +3 more
core   +1 more source

A plasmonic meta-rotary travelling-wave oscillator with ultrahigh phase accuracy and figure of merit

Light: Science & Applications
High phase accuracy and figure of merit (FOM) of quadrature signals are essential for integrated systems, including quadrature amplitude modulation (QAM) communications and multi-input multi-output (MIMO) radar.
Da Yue Yao, Hao Chi Zhang, Pei Hang He, Jia Jie Shen, Jia Wen Zhu, Peigen Zhou, Xin Yu Zhang, Le Peng Zhang, Li Jie Wu, Cun Yue Wei, Rui Wen Shao, Yi Fan, Yang Zhao, Jixin Chen, Wei Hong, Tie Jun Cui   +15 more
doaj   +1 more source

Multi-layer transmission line of spoof surface plasmon polaritons

EPJ Applied Metamaterials, 2022
In modern microwave technology, multi-layer structure is widely adopted in compact circuit design. In a multi-layer microwave system, the transmission line (TL) plays an important role.
Lu Yuxi, Tang Wenxuan, Cui Tie Jun
doaj   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

FEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace, Alyssa Borges, Charles Arnaud, Tove Karlsson, Nina K. Bröker, Stefanie Barbirz, Marta Bally   +6 more
wiley   +1 more source

Planar terahertz metamaterials for strain sensing

, 2012
Extent: 2p.We present two designs of planar terahertz metamaterials for strain sensing. A series of resonance frequency shifts are obtained with differing gap widths when the sensor is under mechanical compression.
Abbott, D., Shah, C., Sriram, S., Ung, B., Charan M. Shah, Madhu Bhaskaran, Withayachumnankul, W., Chang, S., Jining Li, Shengjiang Chang, Bhaskaran, M., Derek Abbott, Benjamin S. Y. Ung, Li, J., Sharath Sriram, Withawat Withayachumnankul   +15 more
core   +1 more source

Artificial intelligence with metasurfaces: from intelligent design to intelligent computing

PhotoniX
The rapid development of artificial intelligence (AI) has revolutionized traditional design and optimization approaches for metamaterials. By leveraging AI techniques, the time required for the metamaterial design process is significantly reduced, thus ...
Qian Ma, Zi Rui Feng, Junming Hou, Che Liu, Yu Ming Ning, Rui Si Li, Qian Wen Wu, Yi Su Huang, Yi Zhang, Ze Gu, Jian Wei You, Tie Jun Cui   +11 more
doaj   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source