Results 71 to 80 of about 4,766 (228)

Broadband Achromatic Programmable Electromagnetic Camouflage via Fluidic‐Accessible Metasurface

Advanced Science, Volume 13, Issue 10, 18 February 2026.
A fluidic access metasurface enables dynamic, broadband electromagnetic illusions. By physically reconstructing conductive patterns with liquid metal, the metasurface achieves real‐time, pixel‐level control over phase dispersion. This allows for the programmable generation of arbitrary strong scattering point arrays, effectively deceiving high ...
Shipeng Liu, Jiahao Zhang, Jiale Wang, Zeyao Chen, Zhaotong Yu, Jinhong Luo, Jiabao Luo, Rujia Cao, Shuxi Gong, Qingxin Guo, Ping Li, Rujiang Li, Ke Chen, Yongtao Jia, Ying Liu   +14 more
wiley   +1 more source

Rapid Diagnostics of Reconfigurable Intelligent Surfaces Using Space‐Time‐Coding Modulation

Advanced Functional Materials, Volume 36, Issue 1, 2 January 2026.
A fast reconfigurable‐intelligent‐surface (RIS) diagnostics method is proposed based on spatio‐temporal modulation with orthogonal codes. Theoretical analysis demonstrates a clear distinction in code channel power between normal and faulty elements. Simulations validate its feasibility under high fault ratios and varying receiving angles.
Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Marco Rossi, Giuseppe Castaldi, Shuo Liu, Tie Jun Cui, Vincenzo Galdi   +7 more
wiley   +1 more source

Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review

, 2013
Advances in reflectarrays and array lenses with electronic beam-forming capabilities are enabling a host of new possibilities for these high-performance, low-cost antenna architectures.
Hum, Sean Victor, Perruisseau-Carrier, Julien   +1 more
core   +1 more source

Design and Applications of Multi‐Frequency Programmable Metamaterials for Adaptive Stealth

Advanced Functional Materials, Volume 36, Issue 5, 15 January 2026.
This article provides a comprehensive overview of metamaterials, including their fundamental principles, properties, synthesis techniques, and applications in stealth, as well as their challenges and future prospects. It covers topics that are more advanced than those typically discussed in existing review articles, while still being closely connected ...
Jonathan Tersur Orasugh, Ankita Mohanty, Amit Malakar, Suryasarathi Bose, Suprakas Sinha Ray   +4 more
wiley   +1 more source

Device for diode tuning in a stripline varactor harmonic multiplier [PDF]

, 1969
Stripline varactor harmonic multiplier uses a device for positioning the varactor diode with respect to the stripline circuit to obtain series resonance.
Steele, K. P.
core   +1 more source

Phase Smoothing for Mutual Coupling Mitigation in Multifunctional Metasurfaces Designed with Diffractive Neural Networks

Advanced Optical Materials, Volume 14, Issue 1, 9 January 2026.
A diffractive neural networkdesigned metasurface operating at 86 GHz generates multiple holographic patterns by controlling the phase of subwavelength unit cells. A phase‐smoothing regularization mitigates mutual coupling, enabling accurate multifunctional wavefront shaping.
Damián Rodríguez‐Trujillo, Alicia E. Torres‐García, Mikel Aldea, Jorge Teniente, Asier Marzo‐Pérez, Miguel Beruete   +5 more
wiley   +1 more source

Optimization of sample-chip design for stub-matched radio-frequency reflectometry measurements

, 2012
A radio-frequency (rf) matching circuit with an in situ tunable varactor diode used for rf reflectometry measurements in semiconductor nanostructures is investigated and used to optimize the sample-specific chip design.
A. Wallraff, B. Küng, G. Puebla-Hellmann, K. Ensslin, M. Beck, M. Pikulski, Pozar D. M., S. Hellmüller, T. Ihn, T. Müller   +9 more
core   +1 more source

Stacked Time‐Varying Metasurfaces

Advanced Optical Materials, Volume 14, Issue 4, 27 January 2026.
Stacked, spatially uniform, time‐modulated metasurfaces replace cumbersome in‐plane modulation. A general design framework optimizes independently programmed temporal functions across cylindrical meta‐atom arrays with time‐varying plasma/collision frequencies, yielding magnet‐free isolation at the carrier and a temporal circulator analogue.
Mostafa Movahediqomi, Sergei Tretyakov, Viktar Asadchy, Xuchen Wang   +3 more
wiley   +1 more source

Frequency multipliers on semiconductor diode structures

Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2018
Obvious advantages of the millimeter wave technology including a large information capacity, high directivity of radiation, diagnostics and spectroscopy capabilities of different environments, including the methods of electron paramagnetic resonance and ...
M. F. Karushkin
doaj   +1 more source

Integrated-circuit balanced parametric amplifier [PDF]

, 1975
Amplifier, fabricated on single dielectric substrate, has pair of Schottky barrier varactor diodes mounted on single semiconductor chip. Circuit includes microstrip transmission line and slot line section to conduct signals.
Dickens, L. E.
core   +1 more source