Results 121 to 130 of about 71,675 (317)

Near and farfield analysis of ultra wideband impulse radio beamforming in the time domain

, 2010
With our interest to enable beamforming and beamsteering for ultra wideband systems, necessary investigations in the time domain were performed to obtain this goal.
Geoffrey Hilton, Mark A. Beach, Beach, Mark A., Mecklenbräuker, Christoph, Philipp K. Gentner, Christoph F. Mecklenbrauker, Hilton, Geoff, Gentner, Philipp K.   +7 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

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

Energy-Efficient Device-to-Device Communications for Green Internet of Things Using Unmanned Aerial Vehicle-Mounted Intelligent Reflecting Surface

Drones
The Internet of Things (IoT) serves as a crucial element in interconnecting diverse devices within the realm of smart technology. However, the energy consumption of IoT technology has become a notable challenge and an area of interest for researchers ...
Fangqing Tan, Shuo Pang, Yashuai Cao, Hongbin Chen, Tiejun Lv   +4 more
doaj   +1 more source

A 1.9 mW 250 MHz Bandwidth Continuous-Time ΣΔ Modulator for Ultra-Wideband Applications

, 2018
This paper proposes an architecture design approach for a wideband continuous-time (CT) ΣΔ modulator with ultra-low oversampling ratio (OSR). The ultra-low OSR is beneficial in terms of power consumption for both the clock distribution network and the ...
Neofytou, M., Q. Liu, Radulov, GI Georgi, Zhou, M., Liu, Q, P. Baltus, L. Breems, Breems, LJ Lucien, M. Neofytou, G. Radulov, Zhang, C Chenming, Zhou, M, M. Zhou, Liu, Q., Bolatkale, Muhammed, Baltus, P.; id_orcid, Baltus, P., Neofytou, M, Zhang, C., Breems, L., M. Bolatkale, Radulov, G., C. Zhang, Baltus, PGM Peter, Bolatkale, M.   +24 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

Stability analysis of the linear time-invariant ultra-wideband channel

, 2012
The stability of a general Linear Time-Invariant (LTI) Ultra-WideBand (UWB) Channel Impulse Response (CIR) model is investigated. Since the s-domain or z-domain function of the UWB CIR has an extremely high number of singularities, it cannot be ...
Ahmad, Saeed, Sugiura, Shinya, Chen, Sheng, Shafiq, Ghufran, Hanzo, Lajos, Riaz, Raja A.   +5 more
core  

High‐Power Rapid Laser‐Induced Synthesis of Multi‐functional Cobalt Metal‐Organic Framework With an Unprecedented Synthesis Efficiency

Advanced Materials Technologies, EarlyView.
Laser‐assisted synthesis enables rapid (within 1 h) and high‐yield (≥90%) production of Co‐MOFs with mesoporous structures, tunable magnetic and optical properties, and efficient adsorption of N2, CH4, and CO2 for low‐energy gas separation. DFT calculations elucidate the electronic structure and adsorption behavior.
Saliha Mutlu, Bülend Ortaç, Ali Karatutlu, Taylan Gorkan, Engin Durgun, Dilek Soyler, Saniye Soylemez, Jelena Lillepäg, Volkan Filiz, Nergis Arsu, Sevil Savaskan Yilmaz   +10 more
wiley   +1 more source

Study and miniaturisation of antennas for ultra wideband communication systems

, 2009
PhDWireless communications have been growing with an astonishing rate over the past few years and wireless terminals for future applications are required to provide diverse services.
Guo, Lu
core  

A wideband RF amplifier for satellite tuners

, 2011
This paper presents the design and measured performance of a wideband amplifier for a direct conversion satellite tuner. It is composed of a wideband low noise amplifier(LNA) and a two-stage RF variable gain amplifier(VGA) with linear gain in dB and ...
Dai, Fa Foster, Xueqing Hu, Hu, Xueqing, Gong, Zheng, Shi, Yin, Yin Shi, Zheng Gong, Hu, X.(xqhu@sci-inc.com.cn), Fa Foster Dai   +8 more
core   +1 more source