Results 61 to 70 of about 5,033 (311)

TECHNIQUES AND INSTRUMENTATION FOR PHASED ARRAY CALIBRATION [PDF]

, 2020
Active phased arrays suffer the inherent problem of excitation errors, i.e., incorrect phase and amplitude excitation of the antenna elements. Excitation errors degrade critical performance parameters since they increase sidelobe level and reduce antenna
Lebron Garcia, Rodrigo
core  

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Progress in phased-array radar applications

, 2022
4 S.During the last decade a rapid progress of phased-array radar systems for military as well as for civil applications can be observed. New extensive programs also in Europe are technology drivers in this field. The aim of this paper is to give a short
Klemm, R., Nickel, U., Ender, J.H.G., Brenner, A.R., Wilden, H., Eibert, T.F., Nüßler, D.   +6 more
core   +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

Progress in phased-array radar application

, 2022
S.113-116During the last decade, a rapid progress of phased-array radar systems for military as well as for civilian applications can he observed. New huge programs - also in Europe - are technological drivers in this field. It's the aim of this paper to
Klemm, R., Ender, J., Nickel, U., Wilden, H., Eibert, T.F., Brenner, A., Nüßler, D.   +6 more
core  

Development of RF Hardware and Point Cloud Processing Method for Phased Array Millimeter Wave Radar

IET Signal Processing
The development of smart transportation has raised the demand for perception and detection of vehicle targets on the road, and compared to traditional methods, such as video cameras, millimeter wave radar applications are becoming increasingly widespread.
Zihang Yan, Hua Zhang, Bo Yan, Jingrong Sun   +3 more
doaj   +1 more source

A Fully Reconfigurable Polarimetric Phased Array Antenna Testbed

International Journal of Antennas and Propagation, 2014
The configurable phased array demonstrator (CPAD) is a low-cost, reconfigurable, small-scale testbed for the dual-polarized array antenna and radar prototype.
Sudantha Perera, Yu Pan, Yan Zhang, Xining Yu, Dusan Zrnic, Richard Doviak   +5 more
doaj   +1 more source

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

Three-Dimensional Multi-Target Tracking Using Dual-Orthogonal Baseline Interferometric Radar

Sensors, 2022
Multi-target tracking (MTT) generally needs either a Doppler radar network with spatially separated receivers or a single radar equipped with costly phased array antennas.
Saima Ishtiaq, Xiangrong Wang, Shahid Hassan, Alsharef Mohammad, Ahmad Aziz Alahmadi, Nasim Ullah   +5 more
doaj   +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