Results 41 to 50 of about 1,208 (193)

Efficient electromagnetic optimization of microwave filters and multiplexers using rational models

IEEE Transactions on Microwave Theory and Techniques, 2004
A method is presented for the efficient optimization of microwave filters and multiplexers designed from an ideal prototype. The method is based on the estimation of a rational function adjusted to a reduced number of samples of the microwave device response obtained either through electromagnetic analysis or measurements.
García Lampérez, Alejandro, Llorente Romano, Sergio, Salazar Palma, Magdalena, Sarkar, Tapan K.   +3 more
openaire   +2 more sources

An On‐Chip Elliptic Bandpass Filter With High Selectivity and High Stopband Attenuation Near the Passband Based on Stacked Series‐Parallel Topology

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
A high selectivity integrated passive device (IPD) on‐chip bandpass filter is presented. The stacked series‐parallel topology is employed to generate two transmission zeros and a transmission pole to maintain high selectivity and high stopband attenuation near the passband.
Hao‐Ran Zhu, Lv‐Bo Ma, Laifu Jin, Hongqing Pan, Shijin Wang   +4 more
wiley   +1 more source

Low‐Complexity Model‐Free Predictive Torque Control for Induction Motor Drives Using an Ultralocal Model

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
This study proposes a parallel observation deviation‐coupled linear active disturbance rejection control (PODC‐LADRC) strategy optimized by a pigeon‐inspired algorithm to mitigate asymmetric aerodynamic loads in large‐scale wind turbines. By utilizing a decoupled observation architecture, the proposed method reconstructs total disturbances with near ...
Md. Belal Hossen, Md. Habibullah
wiley   +1 more source

Measurement, simulation and optimization of wideband log-periodic antennas [PDF]

, 2017
Log-periodic antenna is a special antenna type utilized with great success in many broadband applications due to its ability to achieve nearly constant gain over a wide frequency range.
Ahmed, Qasim, Ahmed, Qasim Z., Holmes, Violeta, Xenos, Thomas D., Mistry, Keyur, Zaharis, Zaharias, Khan, Faheem A., Zaharis, Zaharias D., K. Mistry, Glover, Ian, Z. Zaharis, Lazaridis, Pavlos, V. Holmes, P. Lazaridis, I. Glover, F. Khan, T. Xenos, Khan, Faheem, Q. Ahmed   +18 more
core   +1 more source

Effect of Alternating Magnetic Field on the Organization and Corrosion Resistance of 2205 Duplex Stainless Steel Narrow-Gap Laser-MIG Hybrid Weld Head

, 2023
In this study, an alternating magnetic field is applied in the narrow-gap laser-MIG hybrid welding of 2205 duplex stainless steel with a thickness of 25 mm to achieve the purpose of balancing the ration of the two phases, refining the grains and ...
Yonghui Qin, Yong Zhao, Juan Fu, Fugang Chen, Zhenxing He, Guoqiang Chen   +5 more
core   +1 more source

Wideband Single‐Layer Reflectarray Antenna for Millimeter‐Wave 5G Communications

Journal of Sensors, Volume 2026, Issue 1, 2026.
The rapid evolution of intelligent applications has driven the demand for high‐performance antenna systems. Reflectarrays (RAs), also referred to as planar reflectors, have emerged as a promising solution for modern wireless and satellite communication systems due to their beam‐steering capability and high‐gain characteristics.
S. D. Khan, M. I. Abbasi, I. M. Ibrahim, N. H. Sulaiman, M. H. Dahri, M. A. Humayun, Hela Elmannai, Deepali   +7 more
wiley   +1 more source

Crosswell seismic and electromagnetic monitoring of CO2sequestration [PDF]

, 2002
The quantitative estimation of changes in water saturation (S{sub W}) and effective pressure (P), in terms of changes in compressional and shear impedance, is becoming routine in the interpretations of time-lapse surface seismic data.
Daley, Thomas M., Hoversten, G. Michael, Gritto, Roland, Majer,Ernest L., Majer, Ernest L., Myer, Larry R.   +5 more
core  

Magnetoactive Metamaterials: A State‐of‐the‐Art Review

Advanced Engineering Materials, Volume 27, Issue 23, December 2025.
Magnetoactive metamaterials combine magnetoactive composites with architected metastructures to enable contactless, tunable control of mechanical, acoustic, and elastic properties. This review highlights recent advances in their design, fabrication, and applications in soft robotics, biomedical devices, and adaptive structures and outlines future ...
Seyyedmohammad Aghamiri, Ramin Sedaghati
wiley   +1 more source

A Quadruped Piezoelectric Ultrasonic Actuating Robot with Foot‐Leg‐Trunk‐Integrated Structure

Advanced Robotics Research, Volume 1, Issue 3, December 2025.
This study proposes a novel foot‐leg‐trunk‐integrated quadruped piezoelectric ultrasonic actuating robot with small size and lightweight. A hybrid vibration mode combining the first‐order out‐of‐plane bending vibration of the trunk and the first‐order horizontal bending vibration of driving legs is designed to generate elliptical trajectories at foot ...
Jie Deng, Yue Zhang, Xinchao Hao, Jing Li, Shijing Zhang, Yingxiang Liu   +5 more
wiley   +1 more source

A Periodic Error Correction Method for Terahertz Coded‐Aperture Imaging

Advanced Intelligent Systems, Volume 7, Issue 11, November 2025.
A physics‐constrained unsupervised learning framework with periodic error correction is proposed for terahertz coded‐aperture imaging. The method improves reconstruction robustness against noise and model mismatch, while reducing reliance on large‐scale labeled data.
Hongxu Wu, Jiangtao Ji, Chenxi Liu, Fei Yang, Shuang Peng, Haiying Lu, Junwei Wu, Xiaojian Fu, Huifeng Ma   +8 more
wiley   +1 more source