Results 51 to 60 of about 4,766 (228)
Neural Network–Assisted Metasurface Retroreflector With Wide‐Angle Adaptivity
Electron, EarlyView.This work proposes a wide‐angle, multi‐polarization, self‐sensing, and self‐adaptive intelligent metasurface retroreflector, with a planar profile and ultrathin thickness. By integrating a pre‐trained artificial neural network (ANN), the metasurface retroreflector can recognize the incident angle and promptly adapt to changes in the incoming wave.
Jing Ning +7 more
wiley +1 more source
Frequency reconfigurable antenna based on epsilon negative transmission lines
Electronics Letters, 2023 A novel coplanar waveguide (CPW)‐fed frequency reconfigurable antenna based on epsilon negative transmission line (ENG‐TL) is presented in this letter.
Hao‐nan Luo, Xiao‐lin Yang
doaj +1 more source
Applied Sciences, 2021 In this study, a new concept for a Ka-band 5G communication tunable reflector metasurface (MS) for beam steering at 28 GHz is proposed. Varactor diodes are used as the tunability component of each unit cell of this MS.
Efi Rahamim +2 more
doaj +1 more source
A reconfigurable H-shape antenna for wireless applications [PDF]
, 2010 The official published version of this article can be obtained from the link below - Copyright @ EuCAP2010This paper presents a novel H-Shaped reconfigurable microstrip patch antenna fed by a Grounded Coplanar Waveguide (GCPW) for wireless applications.
AbuTarboush, HF +4 more
core +1 more source
Dynamic Multifunctional Metasurfaces Based on Passive Cascade Structure
Electron, EarlyView.A dynamic multifunctional metasurface is proposed in this paper. Unlike mainstream multifunctional metasurface based on programmable metasurfaces, it consists of two passive metasurfaces, presenting a significant cost advantage. By controlling the displacement, different functions such as beam steering, focusing, and OAM wave generation can be realized
Xiangming Wu +5 more
wiley +1 more source
Toward Sub‐Terahertz: Space‐Time Coding Metasurface Transmitter for Wideband Wireless Communications
Advanced Science, 2023 A space‐time coding metasurface (STCM) operating in the sub‐terahertz band to construct new‐architecture wireless communication systems is proposed. Specifically, a programmable STCM is designed with varactor‐diode‐tuned metasurface elements, enabling ...
Yujie Liu +12 more
doaj +1 more source
Filtenna with Frequency Reconfigurable Operation for Cognitive Radio and Wireless Applications
Micromachines, 2023 A reconfigurable wideband monopole antenna is introduced in this paper for cognitive radio and wireless applications. The reconfigurability was achieved by four varactor diodes embedded in the band pass filter (BPF) structure which was integrated with ...
Mahmoud A. Abdelghany +3 more
doaj +1 more source
GaAs monolithic frequency doublers with series connected varactor diodes [PDF]
, 1984 GaAs monolithic frequency doublers using series connected varactor diodes have been fabricated for the first time. Output powers of 150 mW at 36.9 GHz with 24% efficiency and 300 mW at 24.8 GHz with 18% efficiency have been obtained.
Atwater, H. A. +4 more
core +1 more source
Nonlinear symmetry breaking in photo-metamaterials
, 2017 We design and analyze photo-metamaterials with each meta-atom containing both photodiode and light-emitting diode. Illumination of the photodiode by the light-emitting diode gives rise to an additional optical feedback within each unit cell, which ...
Belov, Pavel A. +4 more
core +1 more source
Intelligent materials for on‐demand electromagnetic absorption
InfoMat, Volume 8, Issue 5, May 2026.This review introduces an innovative “stimulus‐state‐property” paradigm, facilitating a fundamental transition from static to dynamically intelligent electromagnetic wave absorption (EMWA). The key advancement lies in the synergistic integration of external fields with structurally engineered metamaterials and tunable components.
Chongyang Chai +7 more
wiley +1 more source