Results 211 to 220 of about 748,493 (246)
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L-band Overhauser dynamic nuclear polarization
Journal of Magnetic Resonance, 2010We present the development of an Overhauser dynamic nuclear polarization (DNP) instrument at 0.04 T using 1.1 GHz (L-band) electron spin resonance frequencies (ESR) and 1.7 MHz (1)H nuclear magnetic resonance frequencies. Using this home-built DNP system, the electron-nucleus coupling factor of 4-oxo-TEMPO dissolved in water was determined as 0.39+/-0 ...
Sandra, Garcia +4 more
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Vegetation Effects on Covariations of L-Band Radiometer and C-Band/L-Band Radar Observations
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018NASA's Soil Moisture Active-Passive (SMAP) mission aims at disaggregating L-band radiometer (36 km) with L-band radar (1–3 km) observations to obtain an intermediate resolution soil moisture product (1–9 km). Since SMAP's radar stopped operations in July 2015, a substitution with ESA's Sentinel 1 C-band radar is underway.
Link, M +6 more
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$L$ -Band Ocean Surface Roughness
IEEE Transactions on Geoscience and Remote Sensing, 2020Surface wave spectral properties of centimeter to decameter (cmDm) wavelengths are of great interest to microwave remote sensing of the ocean. They are obviously different from the high-frequency extension of the wind-wave spectrum models developed for ocean science and engineering applications, which focus on the longer waves in the energetic peak ...
Paul A. Hwang, Thomas L. Ainsworth
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Applied Mechanics and Materials, 2015
The development was conducted with three configurations of L-Band EDFA, L-Band EDFA utilising Single FBG and Dual Stage L-Band EDFA utilising Dual FBG. The configurations utilising the FBG using 35 meter M-12 Fibercore EDF as the gain medium to amplify the input signal power in the L-band region.
M. Safuan Zainudin +7 more
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The development was conducted with three configurations of L-Band EDFA, L-Band EDFA utilising Single FBG and Dual Stage L-Band EDFA utilising Dual FBG. The configurations utilising the FBG using 35 meter M-12 Fibercore EDF as the gain medium to amplify the input signal power in the L-band region.
M. Safuan Zainudin +7 more
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2016 Radio Frequency Interference (RFI), 2016
In recent years, three instruments have been launched into orbit with the aim of producing global maps of sea surface salinity and soil moisture using the 1400–1427 MHz band: SMOS, Aquarius and SMAP. Although this frequency band is allocated to passive measurements only, RFI (Radio-Frequency Interference) is present in the data of all three missions ...
Yan Soldo +2 more
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In recent years, three instruments have been launched into orbit with the aim of producing global maps of sea surface salinity and soil moisture using the 1400–1427 MHz band: SMOS, Aquarius and SMAP. Although this frequency band is allocated to passive measurements only, RFI (Radio-Frequency Interference) is present in the data of all three missions ...
Yan Soldo +2 more
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Handheld L-Band Microwave Radiometer
2006 IEEE MicroRad, 2006Continued support for remote sensing science requires increased awareness of the general public towards the benefits of this important tool. Unfortunately, information about remote sensing instrumentation and techniques remains inaccessible to many higher-educational institutions due to high cost and lack of expertise and other resources.
E. Chikando +3 more
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Octave-Bandwidth UHF/L-Band Circulator
IEEE Transactions on Microwave Theory and Techniques, 1961Test data are presented on two aluminum-substituted yttrium-iron-garnet (YIG) materials that have low-saturation magnetizations that permit the extension of ferrite devices well into the UHF/VHF region. In particular, one composition has a saturation magnetization of 300 gauss and a line width of 50 oersteds. Measurements are presented that compare the
B. Peyton, B. Kaplan, F. Arams
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L-band Superfluorescent Fiber Source
Journal of Electromagnetic Waves and Applications, 2007An L band superfluorescent fiber source (SFS) is presented. The spectrum covers wavelengths from 1560 nm to 1615 nm. The L band SFS is constructed by a low power L band amplified spontaneous emission (L-ASE) seed source and a high power erbium-ytterbium co-doped fiber (EYDF) amplifier in double pass configuration. The output power of 0.72 W is obtained
R. Gangwar, S. P. Singh, N. Singh
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1976 International Electron Devices Meeting, 1976
An Electron Bombarded Semiconductor (EBS) amplifier has been developed which has a combination of characteristics which make it an attractive alternative to metal-ceramic triodes and transistors for generation of high peak powers at lower microwave frequencies.
B.W. Bell, R.I. Knight
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An Electron Bombarded Semiconductor (EBS) amplifier has been developed which has a combination of characteristics which make it an attractive alternative to metal-ceramic triodes and transistors for generation of high peak powers at lower microwave frequencies.
B.W. Bell, R.I. Knight
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2015 Conference on Microwave Techniques (COMITE), 2015
The paper deals with a modeling and construction of a reflector antenna. Two electronically selected orthogonal antenna planes are realized due to orthogonally oriented ports at primary radiator. Ground clutter suppression is carried out thanks to narrow antenna beam width at elevation plane.
Vadim Zavodny, Petr Kopecky
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The paper deals with a modeling and construction of a reflector antenna. Two electronically selected orthogonal antenna planes are realized due to orthogonally oriented ports at primary radiator. Ground clutter suppression is carried out thanks to narrow antenna beam width at elevation plane.
Vadim Zavodny, Petr Kopecky
openaire +1 more source