Results 71 to 80 of about 498,880 (195)

Reconfigurable Giant Nonreciprocity at Near‐Normal Incidence via Phase‐Change Magneto‐Optical Metagratings

open access: yesLaser &Photonics Reviews, Volume 20, Issue 18, 18 September 2026.
A phase‐change magneto‐optical metagrating combines GST switching with InAs guided‐mode resonances to achieve strong nonreciprocal absorption contrast near normal incidence. A static magnetic bias creates direction‐dependent resonant splitting, while GST crystallization quenches and latches the response.
Ye Ming Qing   +5 more
wiley   +1 more source

DESIGN AND CHARACTERIZATION OF E-SHAPE MICROSTRIP PATCH ANTENNA FOR WIRELESS COMMUNICATION [PDF]

open access: yesICTACT Journal on Communication Technology, 2013
The area of microstrip antennas has seen some inventive work in recent years and is one of the most dynamic fields of antenna theory. The ever increasing need for mobile communication and the emergence of newer technologies require an efficient design of
R. Divya, M. Priya
doaj  

Single‐shot third‐harmonic spectral diagnostics for tender X‐ray FEL pulses using a bent‐crystal spectrometer

open access: yesJournal of Synchrotron Radiation, Volume 33, Issue 5, Page 1486-1494, September 2026.
Third‐harmonic spectral monitoring with an existing bent‐crystal spectrometer provides single‐shot bandwidth diagnostics and real‐time machine tuning for tender X‐ray free‐electron laser operation, and can be made non‐invasive when combined with a suitable beam‐sampling grating.The tender X‐ray (2.0–4.0 keV) region provides access to the K‐edges of ...
Christopher Arrell   +2 more
wiley   +1 more source

Circularly polarized U-Slot antenna [PDF]

open access: yes, 2007
Circularly polarized single-layer U-slot microstrip patch antenna has been proposed. The suggested asymmetrical U-slot can generate the two orthogonal modes for circular polarization without chamfering any corner of the probe-fed square patch microstrip ...
Tong, KF, Wong, TP
core  

Ambient‐Spray Ni–Cu(–O)/Ag Nanowire Transparent Heaters for High‐Temperature Heating and Far‐/Near‐Field EMI Suppression

open access: yesAdvanced Materials Interfaces, Volume 13, Issue 16, 18 August 2026.
A vacuum‐free, ambient‐spray Ni–Cu(–O)/Ag nanowire transparent‐heater platform is realized via conformal junction‐shell engineering and silica–hybrid overcoating, enabling robust high‐temperature heating together with GHz‐band far‐field EMI shielding and near‐field magnetic‐noise attenuation.
Ye Na Heo   +4 more
wiley   +1 more source

Metasurface‐Enabled Active‐Like Passive Radar

open access: yesAdvanced Science, Volume 13, Issue 44, 7 August 2026.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li   +7 more
wiley   +1 more source

Design of microstrip patch antenna using Fennec Fox optimization with SSRR metamaterial for terahertz applications

open access: yesНаучно-технический вестник информационных технологий, механики и оптики
This paper presents the design of a microstrip patch antenna based on a Square Split Ring Resonator (SSRR). Wireless technology is switching from 4G to 5G due to the need to overcome limitations, such as low throughput, high latency and path loss.
S. Kumari   +4 more
doaj   +1 more source

Liquid Metals in Radio Frequency Applications: A Review of Physics, Manufacturing, and Emerging Technologies

open access: yesAdvanced Electronic Materials, Volume 12, Issue 16, 24 August 2026.
This paper reviews the physics of liquid metals in RF devices, including the influence of mechanical strain on resonance as well as fabrication methods and strategies for designing tunable and strain‐tolerant inductors, capacitors, and antennas.
Md Saifur Rahman, William J. Scheideler
wiley   +1 more source

A 0.7 to 30 GHz Coplanar Vivaldi Antenna

open access: yesMicrowave and Optical Technology Letters, Volume 68, Issue 8, August 2026.
ABSTRACT In the literature there are multiple Vivaldi antenna designs that have a wide impedance bandwidth; however, the usable bandwidth is often limited by pattern degradation at the higher frequencies of the band. This paper presents the design and implementation of a coplanar Vivaldi antenna with a 42.9:1 usable bandwidth ratio (0.7–30 GHz).
Jessica Mundell   +3 more
wiley   +1 more source

Feasibility Investigation of SIW Cavity-Backed Patch Antenna Array for Ku Band Applications

open access: yesApplied Sciences, 2019
A cavity-backed microstrip patch antenna array was optimized in the Ku band. The backing cavity was designed under each patch antenna of the array in order to increase the bandwidth and minimize the intercoupling among the radiating elements.
Onofrio Losito   +8 more
doaj   +1 more source

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