Results 81 to 90 of about 19,271 (301)

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

Calibration proposal for new antenna array architectures and technologies for space communications [PDF]

, 2012
In large antenna arrays with a large number of antenna elements, the required number of measurements for the characterization of the antenna array is very demanding in cost and time.
Haro Ariet, Leandro de, Martínez Rodríguez-Osorio, Ramón, Salas Natera, Miguel Alejandro, Sierra Pérez, Manuel   +3 more
core   +2 more sources

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

Calculation of optimal values of weight coefficients for compensation of the mutual coupling of antenna array elements

Физика волновых процессов и радиотехнические системы
Background. Antenna arrays are widely used in a variety of modern radio engineering systems for wireless communication and radar. The phenomenon of mutual coupling of antenna elements, which is manifested in practical implementation, may cause noticeable
Anatoly M. Bobreshov, Alexander A. Kononov, Olga V. Neskorodova, Ksenia V. Smuseva, Grigory K. Uskov   +4 more
doaj   +1 more source

Array Antenna Mutual Coupling Analysis——Mutual Coupling Correction Techniques Based on Induced Electromotive Method of Uniform Circular Array Antennas

Hans Journal of Wireless Communications, 2013
互耦效应导致阵列天线单元间耦合能量的矢量和随扫描角而变化，本文结合等效网络和感应电动势法，通过求出互阻抗求解互耦系数实现互耦误差的校正，仿真结果表明，这种技术可以正确的估计来波方向，且计算量较小。 Mutual coupling effects lead to the coupling energy vector between antenna units changing with the scan angle. For antenna array mutual coupling analysis, signal direction can be correctly estimated by solving the mutual coupling matrix and putting mutual
openaire   +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

Radiation Efficiency Improvement Method for Multifeed Circular Polarization Antenna Array with Mutual Coupling Effect

International Journal of Antennas and Propagation, 2014
In the circular polarization antenna array, the input impedance, axial ratio, and radiation pattern of antenna patch will be changed. Compared with the performances of single antenna, the mutual coupling also led to the low efficiency of all antennas.
Zijian Xing, Ling Wang, Jianying Li, Kun Wei   +3 more
doaj   +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

Mitigation of mutual coupling in microstrip antenna arrays

Технология и конструирование в электронной аппаратуре, 2019
This article demonstrates the alleviation of mutual coupling of a simple and low-cost four-element microstrip array antenna by loading I-shaped slot-type electromagnetic band gap structure in the ground plane. FR-4 glass epoxy is used as dielectric substrate.
K. Prahlada Rao, Van, R.M., Hunagund, P.V.   +2 more
openaire   +3 more sources

Smart Closed‐Loop Systems in Personalized Healthcare: Advances and Outlook

Advanced Materials Technologies, EarlyView.
A smart closed‐loop e‐textile integrates multimodal sensing, onboard processing, wireless communication, and wearable power to enable real‐time physiological/biochemical monitoring and feedback‐controlled therapy. ABSTRACT Smart textiles represent a revolutionary frontier in healthcare, seamlessly blending fabric and advanced technologies to create ...
Safoora Khosravi, Sang Won Lee, Mohammad Abrar Uddin, Sina Hassanpoor, Neha Suvindran, Katherine Le, Harun Arkaz, Harishkumar Narayana, Saeid Soltanian, Danial Khorsandi, Negar Hosseinzadeh Kouchehbaghi, Taeil Kim, Yangzhi Zhu   +12 more
wiley   +1 more source