Results 61 to 70 of about 40,433 (286)

Reducing Open‐Circuit Voltage Losses in Wide‐Bandgap FAPbBr3 Perovskite Solar Cells for Continuous Unassisted Light‐Driven Water Splitting

Advanced Functional Materials, EarlyView.
The combination of formamidinium thiocyanate and 1,3‐propane diammonium iodide for bulk and top‐surface passivation, and a ternary fullerene blend to improve energy band alignment, suppresses energy losses in wide‐bandgap FAPbBr3 perovskite solar cells.
Laura Bellini, Daniël Grosfeld, Bruno Branco, Guus J. W. Aalbers, Lana M. Kessels, Willemijn H. M. Remmerswaal, Nicolas Daub, Kunal Datta, Martijn M. Wienk, René A. J. Janssen   +9 more
wiley   +1 more source

Large-Area, Low-Noise, High Speed, Photodiode-Based Fluorescence Detectors with Fast Overdrive Recovery

, 2005
Two large-area, low noise, high speed fluorescence detectors have been built. One detector consists of a photodiode with an area of 28 mm x 28 mm and a low noise transimpedance amplifier.
D. DeMille, Graeme J., Horowitz P., S. Bickman, Yariv A.   +4 more
core   +3 more sources

A Smart Magnetically Actuated Flip‐Disc Programmable Metasurface with Ultralow Power Consumption for Real‐Time Channel Control

Advanced Functional Materials, EarlyView.
The study proposes a 1‐bit programmable metasurface based on flip‐disc display, named flip‐disc metasurface (FD‐MTS). This new design enables ultralow energy consumption while maintaining coding patterns. It also exhibits high scalability and multifunctional flexibility.
Jiang Han Bao, Che Liu, Jia Cheng Li, Zhen Hao Fu, Yi Su Huang, Si Qi Huang, Lei Zhang, Jian Wei You, Tie Jun Cui   +8 more
wiley   +1 more source

Digitally Controlled Beam-Steerable Printed Dipole Antenna

IEEE Open Journal of Antennas and Propagation
A digitally controlled beam steerable printed dipole antenna operating in ISM band has been proposed using PIN diodes switching mechanism. The proposed antenna provides effective solution of beam steering by establishing adequate coverage in elevation ...
Rajesh Shukla, Sandeep Kumar Yadav, Soumava Mukherjee   +2 more
doaj   +1 more source

Development of a Pin Diode-Based Beam-Switching Single-Layer Reflectarray Antenna

International Journal of Antennas and Propagation, 2020
This paper presents a practical demonstration for the design and development of a switchable planar reflectarray using PIN diodes in the X-band frequency range.
Muhammad Inam Abbasi, Muhammad Yusof Ismail, Muhammad Ramlee Kamarudin   +2 more
doaj   +1 more source

Experimental Characterization of 2 × 2 Electronically Reconfigurable Polarization Converter Unit Cells at X-Band

International Journal of Antennas and Propagation, 2021
In this paper, an electronically reconfigurable polarization converter unit cell operating at X-band is proposed. The polarization converter unit cell consists of a passive patch, a phase shifter, and an active patch.
Biswarup Rana, In-Gon Lee, Ic-Pyo Hong
doaj   +1 more source

1.2 kV Pin Diodes with SiCrystal Epiwafer

Materials Science Forum, 2007
Silicon carbide devices limitations often originate from the quality of the substrate material. Therefore it is interesting to investigate devices fabricated on alternative source materials. Currently, CREE is the world market leader of SiC wafers. Nowadays, some new companies begin to propose alternative material.
Vang, Heu, Raynaud, Christophe, Brosselard, Pierre, Lazar, Mihai, Cremillieu, Pierre, Leclercq, Jean -Louis, Scharnholz, Sigo, Planson, Dominique, Chante, Jean-Pierre   +8 more
openaire   +2 more sources

High Speed Visible Light Communication Using Blue GaN Laser Diodes [PDF]

, 2016
GaN-based laser diodes have been developed over the last 20 years making them desirable for many security and defence applications, in particular, free space laser communications.
Czernecki, R., Giuliano, G., Kelly, A.E., Laycock, L., Leszczyński, M., Marona, L., Najda, S.P., Perlin, P., Rowe, D., Suski, T., Targowski, G., Viola, S., Watson, M. A., Watson, S., White, H., Wisniewski, P.   +15 more
core   +2 more sources

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, EarlyView.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source

A Compact Frequency Reconfigurable Antenna for LTE Mobile Handset Applications

International Journal of Antennas and Propagation, 2015
A compact (8 × 62 × 5 mm3; 2.48 cc) frequency reconfigurable antenna that uses electrical switching with PIN diodes is proposed for the low frequency LTE band (699 MHz–862 MHz), high frequency LTE band (2496 MHz–2690 MHz), GSM850/900 bands (824 MHz–960 ...
Munyong Choi, Hyunho Wi, Byeonggwi Mun, Yonghyun Yoon, Hyunwoo Lee, Byungje Lee   +5 more
doaj   +1 more source