Results 41 to 50 of about 36,752 (222)

A Synthetic Ultra-Wideband Transceiver for Millimeter-Wave Imaging Applications

Micromachines, 2023
In this work, we present a transceiver front-end in SiGe BiCMOS technology that can provide an ultra-wide bandwidth of 100 GHz at millimeter-wave frequencies.
Amir Mirbeik, Laleh Najafizadeh, Negar Ebadi   +2 more
doaj   +1 more source

Printed Wearable Sweat Rate Sensor for Continuous In Situ Perspiration Measurement

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
A wireless wearable sweat rate sensor system is presented, featuring digital 3D direct‐write printing on a flexible substrate with microfluidic layers for continuous, real‐time monitoring. Printed encapsulated metal electrodes are used for capacitance measurements, achieving high sensitivity (0.01 μL min−1) while maintaining a compact and lightweight ...
Mohammad Shafiqul Islam, Sangwon Cha, Md Farhad Hassan, Wenxin Cai, Tahsin Sejat Saniat, Cedar Rose Leach, Yasser Khan   +6 more
wiley   +1 more source

An 0.4–2.8 GHz CMOS Power Amplifier With On-Chip Broadband-Pre-Distorter (BPD) Achieving 36.1–38.6% PAE and 21 dBm Maximum Linear Output Power

IEEE Access, 2021
A broadband 180 nm CMOS power amplifier (PA) operating from a frequency bandwidth of 400 MHz to 2.8 GHz is presented in this paper. The PA is integrated with an inductor-less Broadband-Pre-Distorter (BPD) to enhance its linearity for wide bandwidth.
Selvakumar Mariappan, Jagadheswaran Rajendran, Yusman M. Yusof, Norlaili M. Noh, Binboga Siddik Yarman   +4 more
doaj   +1 more source

Compliant hydrogel cuff coating with real‐time pressure monitoring and antibiofilm capabilities for ventilator‐associated pneumonia prophylaxis

BMEMat, EarlyView.
A soft‐compliant hydrogel cuff coating combines real‐time pressure monitoring with intrinsic antibacterial activity for prophylaxis of ventilator‐associated pneumonia. A flexible pressure‐sensing patch is embedded in the coating to enable wireless dynamic monitoring of endotracheal cuff pressure through Bluetooth.
Jin Chai, Yifu Tan, Jiaheng Liang, Shen Liu, Jiabin Zhao, Shanbo Ma, Chunxin Liu, Minghua Du, Mark Selvan, Xiaopeng Shi, Liqiang Song, Peng Li   +11 more
wiley   +1 more source

Microwave Imaging for Breast Cancer Detection - A Comparison Between VNA and FMCW Radar

IEEE Journal of Microwaves
This paper presents the comparison between microwave imaging for breast cancer detection using a vector network analyzer (VNA) and a frequency-modulated continuous wave (FMCW) radar system.
Martin Maier, Sebastian Paul, Milan Rother, Simona Di Meo, Marco Pasian, Joerg Schoebel, Vadim Issakov   +6 more
doaj   +1 more source

Digital Product Passports in Fashion: A Strategic Framework for Implementation

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT This study investigates the role of the Digital Product Passport (DPP) in promoting transparency, traceability, and sustainability within the fashion industry. As the fashion sector faces significant environmental and social challenges, including resource depletion, pollution, and unethical labor practices, the DPP offers a potential solution ...
Laura Macchion
wiley   +1 more source

Transceiver of underground location system based on visible light color division duplex

Gong-kuang zidonghua, 2014
Existing underground transceiver communication of wireless location system adopts radio wave, and its communication distance and quality are effected by small tunnels and rocks with complex composition.
DENG Jianzhi, CHENG Xiaohui
doaj   +1 more source

A Co‐Designed Implicit‐Reset Path PFD and Current Mismatch Compensated CP Enabling Sub‐0.5% Mismatch and Dead Zone‐Free for Low‐Spur PLLs

International Journal of Circuit Theory and Applications, EarlyView.
A co‐designed implicit‐reset phase‐frequency detector (PFD) and nonlinear amplifier‐assisted charge pump (CP) achieve dead zone‐free operation from 10 MHz to 4.7 GHz with < 0.5% current mismatch without calibration, enabling −80 dBc of reference spur and 0.50 ps of RMS jitter in a 180 nm of CMOS PLL.
A. Ghaemnia, Jincheng Yang, Xiaojiong Fei, G. Zhang   +3 more
wiley   +1 more source

Integrated M-Sequence Based Transceiver for UWB Sensor Networks [PDF]

Radioengineering, 2019
This paper deals with the realization, measure- mentsandtestingofanintegratedUWBradarheadoperating in the continuously transmitted stimulation signal mode. The term UWB is derived from the exploited system bandwidth.
P. Galajda, S. Slovak, M. Sokol, M. Pecovsky, M. Kmec   +4 more
doaj  

Energy System for Wearables

Interdisciplinary Materials, EarlyView.
This review systematically summarizes wearable energy systems, including energy demand, key technical challenges, multi‐channel energy harvesting, flexible energy storage and system integration. We discussed multi‐source hybrid energy harvesting and intelligent energy management in detail, emphasizing their roles in system performance and application ...
Yanjiao Teng, Qing He, Xiaofan Chen, Ting Zhu, Shun Wang, Xiaoming Xu, Jianwei Li, Changyuan Guo, Xuanpeng Wang, Seeram Ramakrishna   +9 more
wiley   +1 more source