Results 211 to 220 of about 12,692 (254)

Printable planar dielectric passive microwave components

2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015
Printable planar dielectric passive microwave components are investigated in this paper. Micron-size-thick films are printed on low-loss microwave substrates and considered as nearly perfect magnetic walls to realize microwave components. The permittivity contrast between the substrate and film is kept high in order to minimize the leakage power and ...
A. Rashidian, L. Shafai, M. Sobocinski, J. Perantie, J. Juuti, H. Jantunen   +5 more
openaire   +1 more source

Use of Passive Microwaves Over the Amazon Forest

[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium, 2005
In this study, an attempt is made to derive the evolution of the water status of the Amazon forest canopy over a short period, from satellite microwave radiometry. The Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) temperature corrected tapes data are analysed for the 6.6, 10.7, 18 and 37 GHz frequencies, at daytime and nighttime, for the ...
Calvet, J.C., Wigneron, Jean-Pierre, Mougin, Éric, Kerr, Yann H., Brito, J.L.S.   +4 more
openaire   +2 more sources

Passive Microwave Sensing of the Earth

MTT-S International Microwave Symposium Digest, 2005
Passive microwave radiometers have found varied geophysical applications, particularly the remote sensing from satellites of atmospheric temperature and humidity profiles, clouds, soil moisture, snow and ice type and coverage, and other parameters.
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Multitemporal passive microwave mapping in MACHYDRO'90

IEEE Transactions on Geoscience and Remote Sensing, 1994
MACHYDR0'90 was an experiment conducted in Pennsylvania in 1990 to study the synergistic use of remote sensors in multitemporal hydrologic studies. As part of this mission the pushbroom microwave radiometer was flown and used to produce brightness temperature maps. Verification studies and vegetation algorithms for mixed land cover areas are described.
Thomas J. Jackson, Edwin T. Engman, David M. Le Vine, Thomas J. Schmugge, Roger H. Lang, Eric F. Wood, William Teng   +6 more
openaire   +1 more source

Passive microwave remote discriminator for the marine applications

SPIE Proceedings, 2016
The specially calculated and prepared antiradar surfaces on special ships is very good for detecting them by the microwave radiometers. It is interesting to evaluate the possibility of using a passive millimeter wave (PMMW) radiometric discriminator for the remote controlling and finding such objects at real distances and also for environmental ...
Alexander Denisov, Hao Liu, Jinghui Qiu, Kateryna Denisova, Francesco Soldovieri   +4 more
openaire   +3 more sources

TiBaCaCuO-films for passive microwave devices

Physica C: Superconductivity, 1992
Abstract Superconducting TlBaCaCuO-films were prepared by a two-step method. The Tl-HTSC films on LaALO3-substrates are single- phase, highly c-axis oriented, and have critical temperatures up to 116 K. The films have surface resistances of 35 mΩ at 77 K and 92 GHz and were tested for microwave devices. Furthermore we propose a new structuring method
M. Manzel, H. Bruchlos, E. Steinbeiβ, T. Eick, M. Klinger, J. Fuchs, B. Kley   +6 more
openaire   +1 more source

Passive Microwave Observations - An Introduction

1981
The papers presented in this session mostly describe early attempts to correlate observed SEASAT-1 and Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) radiances or brightness temperatures with sea surface temperature (SST), near-surface winds, cloud droplets, atmospheric water vapor and rainfall rates.
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Passive Four-Pole Admittances of Microwave Triodes

Bell System Technical Journal, 1949
Measurements have been made of the passive, four-pole admittances of parallel-plane triodes over a wide range of cathode-to-grid and grid-to-plate spacings at a frequency of 4060 megacycles. Results are given for a parallel wire grid and a cross-lateral grid.
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Passive Microwave Devices and Their Applications

1993
The very low microwave surface resistance of superconducting thin films permits the realization of microwave devices with performance unattainable with conventional technology. Transmission lines, for example, have very low propagation loss, even in the form of subminiature microstrip, and resonators can have very high quality factors.
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Introduction to Passive Microwave Retrieval Methods

2020
This chapter introduces the reader to the basic concepts behind the remote sensing of precipitation from passive microwave radiation. Distinctions are drawn between emission-based frameworks that work well over radiometrically cold oceans, scattering methods that work better over land, and the newer optimal estimation methods that incorporate both of ...
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