Results 101 to 110 of about 18,440 (296)

Pattern Synthesis of Dual-band Shared Aperture Interleaved Linear Antenna Arrays [PDF]

, 2014
This paper presents an approach to improve the efficiency of an array aperture by interleaving two different arrays in the same aperture area. Two sub-arrays working at different frequencies are interleaved in the same linear aperture area. The available
Ding, J., Guo, C. J., Guo, H.
core   +1 more source

Massive MIMO is a Reality -- What is Next? Five Promising Research Directions for Antenna Arrays

, 2019
Massive MIMO (multiple-input multiple-output) is no longer a "wild" or "promising" concept for future cellular networks - in 2018 it became a reality.
Björnson, Emil, Hoydis, Jakob, Marzetta, Thomas L., Sanguinetti, Luca, Wymeersch, Henk   +4 more
core   +1 more source

Multifunctional Microstructured Surfaces by Microcontact Printing of Reactive Microgels

Advanced Functional Materials, EarlyView.
Reactive poly(N‐vinylcaprolactam‐co‐glycidyl methacrylate) microgels are used as functional inks to create surface‐grafted arrays on glass via microcontact printing. The patterns (10–50 µm widths and spacings) enable stable binding and post‐functionalization with dyes and peptides.
Inga Litzen, Alexander Töpel, Martin Zenke, Antonio Sechi, Andrij Pich   +4 more
wiley   +1 more source

Adaptive Double Pulse Dual Coprime Frequency Diverse Array Multiple Input Multiple Output Radar for Enhanced Range, Angle and Doppler Estimation

IET Microwaves, Antennas & Propagation
In this paper, we propose a Double Pulse‐based Dual Coprime Frequency Diverse Array Multiple Input Multiple Output (DCFDA‐MIMO) radar for enhanced target parameter estimation, including range, angle, and Doppler.
Umair Hafeez Khan, Abdul Basit, Nauman Anwar Baig, Wasim Khan, Muhammad Adeel Khan Jadoon   +4 more
doaj   +1 more source

High‐Spatiotemporal‐Resolution Transparent Thermoelectric Temperature Sensor Arrays Reveal Temperature‐Dependent Windows for Reversible Photothermal Neuromodulation

Advanced Functional Materials, EarlyView.
Thermoelectric temperature sensors are developed that directly measure heat changes during optical‐based neural stimulation with millisecond precision. The sensors reveal the temperature windows for safe reversible neural modulation: 1.4–4.5 °C enables reversible neural inhibition, while temperatures above 6.1 °C cause permanent thermal damage.
Junhee Lee, Dongjo Yoon, Jungha Lee, Duhee Kim, Eunui Kim, Jong‐Hyeok Yoon, Hyuk‐Jun Kwon, Seungjun Chung, Yoonkey Nam, Hongki Kang   +9 more
wiley   +1 more source

Satellite phased arrays for direct-to-handset satellite: key technologies and future vision

Dianxin kexue
To address the long distance and significant loss in satellite-to-ground wireless link, new demands are imposed on satellite phased arrays by direct-to-handset satellite.
JIAO Lingxiao, LI Wenjing, TONG Jianfei, LI Jifeng   +3 more
doaj   +2 more sources

Multi-stage Antenna Selection for Adaptive Beamforming in MIMO Arrays

, 2019
Increasing the number of transmit and receive elements in multiple-input-multiple-output (MIMO) antenna arrays imposes a substantial increase in hardware and computational costs.
Aboutanios, Elias, Nosrati, Hamed, Smith, David   +2 more
core   +1 more source

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

Advanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang, Jinliang Lv, Yichun Lu, Hanfeng Ye, Xuan Zhang, Leonardo Cancellara, Nadezda Tarakina, Jiande Lin, Xin Gao, Oleksandr Savateev, Jiajia Cheng   +10 more
wiley   +1 more source

Synthesis of Phased Cylindrical Arc Antenna Arrays

International Journal of Antennas and Propagation, 2009
This paper describes a new approach to synthesize cylindrical antenna arrays controlled by the phase excitation, to synthesize directive lobe and multilobe patterns with steered zero.
Hussein Rammal, Charif Olleik, Kamal Sabbah, Mohammad Rammal, Patrick Vaudon   +4 more
doaj   +1 more source

Design and Implementation of Multiband Microstrip Patch Antenna for Wireless Applications

Advanced Electromagnetics, 2018
Multiband phased array antennas are required for today’s multi-function communication applications. Generally Microstrip antenna arrays like Kotch array, Sierpinski array are used, but in some circuits where space is limited, arrays are not used ...
L. Prasad, B. Ramesh, K. S. R. Kumar, K. P. Vinay   +3 more
doaj   +1 more source