Results 91 to 100 of about 40,531 (305)

A Low-Profile Pattern Reconfigurable MIMO Antenna

IEEE Access, 2020
A low-profile pattern reconfigurable multiple-input multiple-output (MIMO) antenna is demonstrated in this paper. The antenna element is composed of a rectangular monopole and two sets of parasitic strips loaded with PIN diodes.
Liping Han, Yiwei Ping, Yufeng Liu, Guorui Han, Wenmei Zhang   +4 more
doaj   +1 more source

Localized Temperature Monitoring in Mouse Brain during Light Delivery via a Non‐Planar Tapered Fiber‐Integrated µRTD Sensor

Advanced Materials, EarlyView.
We report a multifunctional tapered optical fiber integrating a conformal micro‐resistance temperature detector (µRTD) for local, real‐time thermometry during optical stimulation. The platform combines light‐delivery and temperature sensing within a minimally invasive footprint, enabling detection of sub‐degree cortical heating under representative ...
Antonio Balena, Marco Bianco, Barbara Spagnolo, Muhammad Fayyaz Kashif, Alberto Bramati, Massimo De Vittorio, Ferruccio Pisanello   +6 more
wiley   +1 more source

Pattern Reconfigurable Antenna Using Circular Grooved SIW for 5G Millimeter-Wave Communications

IEEE Access
This article presents a novel design of a 360° azimuthal plane pattern reconfigurable antenna (PRA) based on a substrate integrated waveguide (SIW) technique for 5G NR (n258) millimeter-wave (mmWave) applications.
Amitkumar Patel, William G. Whittow, Chinthana J. Panagamuwa   +2 more
doaj   +1 more source

Single-, Dual- and Triple-band Frequency Reconfigurable Antenna [PDF]

, 2014
The paper presents a frequency reconfigurable slot dipole antenna. The antenna is capable of being switched between single-band, dual-band or triple-band operation.
Hamid, M. R., Idris, I. H., Jamaluddin, M. H., Kelly, J. R., Majid, H. A., Rahim, M. K. A.   +5 more
core   +1 more source

Single‐Atom Photocatalyst as Floatable Artificial Leaf for Upcycling Oceanic Plastic Waste

Advanced Materials, EarlyView.
To resolve the catastrophic disaster of oceanic plastic pollution, the novel Ru single atom loaded ZnIn2S4 photocatalysts, in the forms of powder or floatable artificial leaf, were prepared for direct conversion of raw polypropylene plastic into valuable chemicals. The optimized catalyst exhibits exceptional performance, with a total formic/acetic acid
Amin Talebian‐Kiakalaieh, Xin Xu, Wenzhong Ji, Yun Liu, Bingquan Xia, Jingrun Ran, Shi‐Zhang Qiao   +6 more
wiley   +1 more source

Planar Inverted-F Antennas (PIFA) for multiband wireless applications [PDF]

, 2010
This is a post-print version of the article - Copyright @ 2010 IEEEA compact reconfigurable four bands Planar Inverted-F Antenna (PIFA) is presented for Digital Video Broadcasting – Handheld (DVB-H), Universal Mobile Telecommunications System (UMTS ...
AbuTarboush, HF, Nilavalan, R, Peter, T
core  

Amplitude to phase conversion of InGaAs pin photo-diodes for femtosecond lasers microwave signal generation

, 2011
When a photo-diode is illuminated by a pulse train from a femtosecond laser, it generates microwaves components at the harmonics of the repetition rate within its bandwidth.
A. Bartels, A. Joshi, A.D. Ludlow, B. Lorbeer, D. Kuhl, D.R. Leibrandt, E.N. Ivanov, E.N. Ivanov, G. Santarelli, J. Kim, J. Kim, J. Kim, J. Millo, J. Millo, J. Millo, J. Taylor, J.J. McFerran, K. Wu, K.J. Williams, M. Dentan, M. Lours, M.A. Preciato, M.S. Kirchner, R. Holzwarth, S. Min, S. Seidelin, S. Weyers, S.A. Webster, T. Li, T. Steinmetz, T.M. Fortier, T.M. Ramond, W. Zhang, W. Zhang, W. Zhang, Y. Le Coq, Y.Y. Jiang   +36 more
core   +2 more sources

High speed InAs electron avalanche photodiodes overcome the conventional gain-bandwidth product limit [PDF]

, 2011
High bandwidth, uncooled, Indium Arsenide (InAs) electron avalanche photodiodes (e-APDs) with unique and highly desirable characteristics are reported. The e-APDs exhibit a 3dB bandwidth of 3.5 GHz which, unlike that of conventional APDs, is shown not to
David, John P. R., Ker, Pin Jern, Krysa, Andrey, Marshall, Andrew R. J., Tan, Chee Hing   +4 more
core   +1 more source

All‐Optical Reconfigurable Physical Unclonable Function for Sustainable Security

Advanced Materials, EarlyView.
An all‐optical reconfigurable physical unclonable function (PUF) is demonstrated using plasmonic coupling–induced sintering of optically trapped gold nanoparticles, where Brownian motion serves as a robust entropy source. The resulting optical PUF exhibits high encoding density, strong resistance to modeling attacks, and practical authentication ...
Jang‐Kyun Kwak, Changgyun Moon, Hyun‐Bin Yu, Sunkook Kim, Dong‐Hwan Kim   +4 more
wiley   +1 more source

Backscatter Transponder Based on Frequency Selective Surface for FMCW Radar Applications [PDF]

, 2014
This paper describes an actively-controlled frequency selective surface (FSS) to implement a backscatter transponder. The FSS is composed by dipoles loaded with switching PIN diodes. The transponder exploits the change in the radar cross section (RCS) of
Girbau, D., Lazaro, A., Lorenzo, J., Villarino, R.   +3 more
core   +1 more source