Results 41 to 50 of about 748,247 (314)

Orbital Geometry‐Governed Response of Pressure‐Tunable Quantum Defects in hBN

Advanced Functional Materials, EarlyView.
Defects in hBN act as ultrasensitive quantum manometers when the energy of the intradefect optical transitions is modified by lattice compression. The orbital geometry of the electron wave functions governs how electron hopping and Coulomb interactions react uniquely to the reduction of the van der Waals gap and in‐plane compression, leading to robust ...
Magdalena Grzeszczyk, Danis I. Badrtdinov, Kenji Watanabe, Takashi Taniguchi, Cyrus E. Dreyer, Malte Rösner, Maciej Koperski   +6 more
wiley   +1 more source

Dumbbell Shaped Microstrip Broadband Antenna

Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2019
The article proposes a dumbbell shaped broadband microstrip antenna which consists of dumbbell shaped octagons and a valley shaped backplane with a partial ground plane and multiple circular and rectangular slits.
S. Baudha, Harshit Garg, M. V. Yadav
semanticscholar   +1 more source

Design of Single-Layer Broadband Omnidirectional Metasurface Antenna Under Single Mode Resonance

IEEE Transactions on Antennas and Propagation, 2021
A single-layer broadband vertically polarized (VP) omnidirectional metasurface antenna is proposed in this communication. To guide the optimization and design of the antenna, characteristic mode (CM) analysis (CMA) is performed to investigate the ...
Sihao Liu, Deqiang Yang, Yongpin P. Chen, K. Sun, Xiaokun Zhang, Yong Xiang   +5 more
semanticscholar   +1 more source

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

A Compact Broadband Antenna for Civil and Military Wireless Communication Applications

International Journal of Advanced Computer Science and Applications, 2019
This paper presents a compact broadband antenna for civil and military wireless communication applications. Two prototypes of the antenna are designed and simulated.
Z. Dayo, Q. Cao, Yi Wang, S. Ur, P. Soothar   +4 more
semanticscholar   +1 more source

A low-profile broadband crossed-dipole antenna with fractal structure and inverted-L plates

Scientific Reports, 2022
A low-profile broadband circularly polarized (CP) crossed-dipole antenna is proposed. In this antenna, the dipole uses a fractal-based structure with multiple similar patches for obtaining broadband CP radiation and impedance matching.
Guirong Feng, Tianyi Qi, Mingming Li, Jiachen Li, Xin-wei Wang, Hai-long Yang   +5 more
doaj   +1 more source

Novel Square Spiral Antennas for Broadband Applications [PDF]

Frequenz, 2009
An investigation of novel square spiral antennas is presented. The antennas are designed by considering the special arrangements of spiral arms. The new designs perform much better in terms of the frequency independency of the fundamental antenna parameters, when compared with the well known and widely used Archimedean spiral antenna, which makes the ...
Saynak, Ugur, Kustepeli, Alp
openaire   +3 more sources

Oxidized MoS2‐Based Multifunctional Memristive Hardware for Energy‐Efficient mmWave Signal Processing and In‐Memory Matrix Multiplication

Advanced Functional Materials, EarlyView.
Thermally oxidized MoS2‐based radio‐frequency switches enable a multifunctional platform that unifies broadband RF switching and in‐memory computation. The device achieves a cutoff frequency of 33.2 THz with high energy efficiency and supports hardware‐aware signal processing.
Juho Son, Changwoo Pyo, Sungmoon Park, Yoongi Cho, Seungchan Lee, Myungsoo Kim   +5 more
wiley   +1 more source

Submicron Metasurface Reconfigured Multiband Smart Windows

Advanced Functional Materials, EarlyView.
This work presents a submicron metasurface reconfigured multiband thermochromic smart window. By integrating subwavelength nanostructures into a Fabry−Perot resonator configuration, it mitigates conventional trade‐offs to simultaneously deliver high luminous transmittance and robust solar heating and radiative cooling modulation capabilities ...
Guanya Wang, Shancheng Wang, Bin Li, Xinyi Tian, Rong Liu, Jian Chen, Zhendong Dai, Shouqin Tian, Yi Long   +8 more
wiley   +1 more source

A Low-Coupling Broadband MIMO Array Antenna Design for Ku-Band Based on Metamaterials [PDF]

Journal of Electromagnetic Engineering and Science
In response to the demand for broadband antennas in 5G mobile communications, this paper proposes a compact broadband multiple-input multiple-output (MIMO) antenna array.
Xuemei Zheng, Ziwei Zhao, Yunan Zhang, Tongchao Zhang, Ao Gui, Han Wu   +5 more
doaj   +1 more source