Results 51 to 60 of about 506,346 (193)

A Linear Active Rampart Antenna Array With Two‐Dimensional Beam‐Scanning Capability for FMCW Radar Applications

International Journal of Antennas and Propagation, Volume 2026, Issue 1, 2026.
A novel linear active rampart array that is able to steer in the azimuth plane through frequency sweeping and in the elevation plane through phase shifting has been developed. The presented system uses eight active elements and two parasitic ones to ensure consistent radiation patterns.
Tudor Ioan Popa, Gabriele Federico, A. Bart Smolders, Diego Caratelli, Chien-Jen Wang   +4 more
wiley   +1 more source

Beam-Switching Antenna Array Using Rotman Lens for Railway Communication at 28 GHz [PDF]

Journal of Electromagnetic Engineering and Science
In this paper, a multibeam antenna without a phase shifter is designed for railway communications in the upper 5G band (28 GHz). Railway turning angles can reach up to −20° to 20° depending on line geometry and train speed.
Hyeongjun Cho, Jaehyun Kim, Ashwini K. Arya, Chang-Woo Kim, Sanghoek Kim   +4 more
doaj   +1 more source

Foreign English teachers’ intercultural reactions to China's “Double Reduction” policy

World Englishes, Volume 44, Issue 4, Page 624-637, December 2025.
Abstract The Chinese government's 2021 “Double Reduction” policy decimated the online language tutoring industry. Beyond erasing billions of dollars of value, hundreds of thousands of foreign‐based online English teachers lost their jobs as a result of the policy.
Nate Ming Curran
wiley   +1 more source

Optimum Wideband High Gain Analog Beamforming Network for 5G Applications

IEEE Access, 2019
A broadband high-gain millimeter-wave (mmWave) array beamforming network (BFN) design, analysis, and implementation based on the Rotman lens antenna array feeding are presented.
Essa H. Mujammami, Islam Afifi, Abdelrazik B. Sebak   +2 more
doaj   +1 more source

Interrogating the Economic, Environmental, and Social Impact of Artificial Intelligence and Big Data in Sustainable Entrepreneurship

Business Strategy and the Environment, Volume 34, Issue 7, Page 8305-8320, November 2025.
ABSTRACT Artificial intelligence and big data are increasingly being integrated into sustainable entrepreneurship practices. Yet, conventional literature often neglects to critically examine their economic, environmental, and social implications. We conducted a systematic literature review to understand when, how, and for whom artificial intelligence ...
Nathanael Ojong
wiley   +1 more source

Design of a High Return Loss 4 × 4 Butler Matrix Without Crossover for 5G Base Station

Engineering Reports, Volume 7, Issue 9, September 2025.
The final design of the proposed Butler matrix without crossover. (a) Butler schematic with the port numbers and (b) fabricated prototype of the proposed compact Butler matrix. ABSTRACT This paper presents a compact broadband 4 × 4 Butler matrix (BM) with high input return loss and without crossover components.
Mohammad Bod, Fatemeh Geran
wiley   +1 more source

Mother of Holiness: Phoebe Palmer's Maternal Grief, Silence, and Spiritual Leadership in her Spiritual Narrative

Journal of Religious History, Volume 49, Issue 3, Page 343-358, September 2025.
This article expands upon a central aspect of Holiness evangelist Phoebe Palmer's (1807–1874) theology, which has been only tangentially mentioned by scholars: her gendered identity of motherhood. It first considers how Palmer narrated the deaths of her first two sons in her spiritual narrative The Way of Holiness as divine punishment for her ...
Layla Koch
wiley   +1 more source

Rotman lens-based two-tier hybrid beamforming for wideband mmWave MIMO-OFDM system with beam squint

EURASIP Journal on Wireless Communications and Networking, 2018
In this paper, we study the hybrid beamforming for the wideband mmWave multiuser MIMO-OFDM system. We characterize the frequency-dependent beam angle problem, i.e., beam squint effect. Firstly, we extend the mmWave channel model from the Saleh-Valenzuela
Bin Liu, Hongbo Zhu
doaj   +1 more source

On the Impact of Spillover Losses in 28 GHz Rotman Lens Arrays for 5G Applications [PDF]

, 2018
This work demonstrates the sensitivity of lens antenna arrays operating at millimeter-wave (mmWave) frequencies. Considering a Rotman lens array in receive mode, our investigation focuses on its most imperative defect: aberration of electromagnetic (EM ...
Fusco, Vincent F. ; id_orcid, Tataria, Harsh,, Fusco, Vincent F,, Matthaiou, Michail,, M. Ali Babar Abbasi, Harsh Tataria, Matthaiou, Michail; id_orcid, Abbasi, Muhammad Ali Babar,, Tataria, Harsh, Vincent F. Fusco, Abbasi, Muhammad Ali Babar; id_orcid, Michail Matthaiou, Lund University.   +12 more
core   +1 more source

Understanding the Complexity of Governing Energy Transitions: Introducing an Integrated Approach of Policy and Transition Perspectives

Environmental Policy and Governance, Volume 35, Issue 4, Page 595-614, August 2025.
ABSTRACT This article offers a comprehensive examination of integrating transition studies and policy studies in the context of energy transitions, highlighting the importance of participatory governance, reflexive policy frameworks, and innovation ecosystems.
Jörg Radtke
wiley   +1 more source