Wide-band optical fibre local distribution systems

1980 ◽  
Vol 12 (5) ◽  
pp. 353-381 ◽  
Author(s):  
G. Mogensen
Keyword(s):  
Optical Fibre ◽  
Distribution Systems ◽  
Wide Band ◽  
Local Distribution

scholarly journals A National Estimate of Methane Leakage from Pipeline Mains in Natural Gas Local Distribution Systems

2020 ◽  
Vol 54 (14) ◽  
pp. 8958-8967 ◽  
Author(s):  
Zachary D. Weller ◽  
Steven P. Hamburg ◽  
Joseph C. von Fischer
Keyword(s):  
Natural Gas ◽  
Distribution Systems ◽  
Local Distribution ◽  
Methane Leakage

scholarly journals Power Scalable Bi-Directional DC-DC Conversion Solutions for Future Aircraft Applications

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5470
Author(s):  
Antonio Lamantia ◽  
Francesco Giuliani ◽  
Alberto Castellazzi
Keyword(s):  
High Voltage ◽  
Power Distribution ◽  
Distribution Systems ◽  
Low Voltage ◽  
Leading Edge ◽  
Wide Band ◽  
Distribution Networks ◽  
Significant Degree ◽  
Energy Storage Devices ◽  
Power Distribution Networks

With the introduction of the more electric aircraft, there is growing emphasis on improving overall efficiency and thus gravimetric and volumetric power density, as well as smart functionalities and safety of an aircraft. In future on-board power distribution networks, so-called high voltage DC (HVDC, typically +/−270VDC) supplies will be introduced to facilitate distribution and reduce the associated mass and volume, including harness. Future aircraft power distribution systems will also very likely include energy storage devices (probably, batteries) for emergency back up and engine starting. Correspondingly, novel DC-DC conversion solutions are required, which can interface the traditional low voltage (28 V) DC bus with the new 270 V one. Such solutions presently need to cater for a significant degree of flexibility in their power ratings, power transfer capability and number of inputs/outputs. Specifically, multi-port power-scalable bi-directional converters are required. This paper presents the design and testing of such a solution, addressing the use of leading edge wide-band-gap (WBG) solid state technology, especially silicon carbide (SiC), for use as high-frequency switches within the bi-directional converter on the high-voltage side.

scholarly journals An Ultra-Wide Band Antenna System for Pulsed Sources Direction Finding

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4695
Author(s):  
Razvan D. Tamas ◽  
Stefania Bucuci
Keyword(s):  
Power Distribution ◽  
Distribution Systems ◽  
Wide Band ◽  
Direction Finding ◽  
Antenna System ◽  
Ultra Wide Band ◽  
Electric Discharges ◽  
Power Distribution Systems ◽  
Short Pulses ◽  
Electromagnetic Signature

Electric discharges in high-voltage power distribution systems can be localized through their electromagnetic signature in the radio-frequency range. Since discharges produce series of short pulses, the corresponding spectrum usually covers wide frequency ranges, typically up to 1 GHz. In this paper, we propose an ultra-wide band (UWB) antenna system and a direction-finding (DF) approach based on using energy-based descriptors, instead of classical frequency-domain parameters. As an antenna system, we propose a dual-padlock configuration with a suitable pulse-matched response, featuring two unbalanced outputs. The proposed antenna system was successfully validated, both by simulations and measurements.

Wide-band Fabry-Perot-like filters in optical fibre

2002 ◽  
Author(s):  
G. Town ◽  
K. Sugden ◽  
J. Williams ◽  
I. Bennion ◽  
S. Poole
Keyword(s):  
Optical Fibre ◽  
Wide Band ◽  
Fabry Perot

scholarly journals Wide-Band Optical Fibre System for Investigation of MEMS and NEMS Deflection

2014 ◽  
Vol 21 (3) ◽  
pp. 381-388 ◽  
Author(s):  
Karolina Orłowska ◽  
Michał Świątkowski ◽  
Piotr Kunicki ◽  
Piotr Słupski ◽  
Anna Sankowska ◽  
...  
Keyword(s):  
Light Source ◽  
Optical Fibre ◽  
Electronic Devices ◽  
Current Source ◽  
Wide Band ◽  
Linear Displacement ◽  
Experimental Setup ◽  
Fibre Optic

Abstract In this work the construction of experimental setup for MEMS/NEMS deflection measurements is presented. The system is based on intensity fibre optic detector for linear displacement sensing. Furthermore the electronic devices: current source for driving the light source and photodetector with wide-band preamplifier are presented.

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