Results 81 to 90 of about 3,855 (302)

An experimental evaluation of three candidate MIMO array designs for PDA devices

, 2004
It is well known that multiple-input, multiple-output (MIMO) wireless channels, in which multi-element antenna arrays are used at both ends of the link, can in principle offer spectral efficiencies an order of magnitude or more above those available ...
Williams, C, Rogers, PR, Capstick, M, Kemp, B, Rogers, P, Hunukumbure, RMM, Hunukumbure, MR, Beach, MA, Hilton, GS   +8 more
core  

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

MUTUAL COUPLING EFFECT ON MIMO ANTENNA

, 2020
To reduce mutual coupling effect on MIMO Antenna this paper presents the analysis of bent ground plane antennas for multiple-input-multiple-output (MIMO). First, the three plate antenna array patterns of the envelope correlation coefficients are proposed
KALAMKAR, BHUSHAN R., KHADE, SACHIN S., BADJATE, B.L.   +2 more
core   +1 more source

Improving Wide-Angle Scanning Performance of Phased Array Antenna by Dielectric Sheet

IEEE Access, 2019
The method to improve the wide-angle scanning performance of the phased array antenna is studied and presented. The proposed method is realized by the dielectric sheet to reduce the size of the wide beam antenna and mutual coupling between the elements ...
Guangwei Yang, Qingqing Chen, Jianying Li, Shigang Zhou, Zijian Xing   +4 more
doaj   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Spatial data stream multiplexing scheme for high-throughput WLANs

, 2008
A novel scheme using spatial data stream multiplexing (SDSM) in the upcoming multiple-input multipleoutput (MIMO)-based IEEE 802.11n physical layer is proposed.
Nilavalan, R, Gravalos, AG, Ni, Q, Hadjinicolaou, M   +3 more
core  

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Mutual coupling compensation of compact antenna array for direction-of-arrivals estimations

, 2010
Mutual coupling is well known as an undesirable effect as it degrades the performance of most array signal processing algorithm. Such undesirable effect becomes significant when the antenna element spacing becomes small, which is the case for compact ...
Hui, H.T., Lui, Hoi Shun, Hon Tat Hui, Hui, Hon Tat, Lui, H.-S., Hui, H. T., Lui, Hoi-Shun, Hoi-Shun Lui, Hui, H. T.,, Lui, Hoi-Shun,   +9 more
core   +1 more source

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

Advanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel, Bastian Jülich, Anna Rosa Ziefuss, Florian Eibl, Stephan Barcikowski   +4 more
wiley   +1 more source

Mutual Coupling Reduction in Microstrip Patch Antenna Array by simple I-Shaped DGS using Full Wave Electromagnetic Simulator

, 2015
When a number of antennas are placed in an array formation, the mutual coupling between the array elements becomes a critical issue. The Microstrip Patch Antennas are useful in sending the onboard parameters to the ground, under different operating ...
, Lavesh Gupta, Mr. Mayank Joshi, Mr. Abhi
core   +1 more source