WorldCat Identities

Liebe, H. J. (Hans J.)

Overview
Works: 31 works in 71 publications in 2 languages and 1,685 library holdings
Genres: Observations  Surveys 
Roles: Author
Publication Timeline
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Most widely held works by H. J Liebe
Estimates of maximum electric field strengths in the automobile environment by H. J Liebe( )

4 editions published in 1979 in English and held by 336 WorldCat member libraries worldwide

Field maxima inside habitable structures exposed to 2.45 GHz plane wave radiation by H. J Liebe( )

3 editions published in 1980 in English and held by 325 WorldCat member libraries worldwide

Millimeter-wave properties of the atmosphere : laboratory studies and propagation modeling by H. J Liebe( Book )

4 editions published in 1987 in English and held by 134 WorldCat member libraries worldwide

Millimeter-wave propagation in the mesosphere by G. A Hufford( Book )

5 editions published in 1989 in English and Undetermined and held by 116 WorldCat member libraries worldwide

The atmospheric 60-GHz oxygen spectrum : modeling and laboratory measurements by H. J Liebe( Book )

2 editions published in 1991 in English and held by 110 WorldCat member libraries worldwide

Estimates of millimeter wave attenuation for 18 United States cities by K. C Allen( Book )

4 editions published in 1983 in English and held by 94 WorldCat member libraries worldwide

A computational model for the simulation of millimeter-wave propagation through the clear atmosphere by Jerry D Hopponen( Book )

4 editions published in 1986 in English and held by 85 WorldCat member libraries worldwide

An atmospheric millimeter wave propagation model by H. J Liebe( Book )

5 editions published between 1983 and 1984 in English and held by 82 WorldCat member libraries worldwide

The neutral atmosphere is characterized for the frequency range from 1 to 300 GHz as a nonturbulent propagation medium. Attenuation and propagation delay effects are predicted from meteorological data sets: pressure, temperature, humidity, suspended particle concentration, and rain rate. The physical data base of the propagation model consists of four terms: (a) resonance information for 30 water vapor and 48 oxygen absorption lines in the form of intensity coefficients and center frequency for each line; (b) a composite (oxygen, water vapor, and nitrogen) continuum spectrum; (c) a hydrosol attenuation term for haze, fog, and cloud conditions; and (d) a rain attenuation model. Oxygen lines extend into the mesosphere, where they behave in a complicated manner due to the Zeeman effect. The geomagnetic field strength H is required as an additional input parameter. Each O2 line splits proportionally with H into numerous sub-lines, which are juxtaposed to form a Zeeman pattern spread over a megahertz scale. Patterns for three main polarization cases are calculated. Detailed examples for model atmosphere provide basic millimeter wave propagation information over the height range 0 to 100 km of the neutral atmosphere
Molecular absorption test at 35 GHz by H. J Liebe( Book )

4 editions published in 1982 in English and held by 81 WorldCat member libraries worldwide

Millimeter-wave propagation in moist air : model versus path data by H. J Liebe( Book )

5 editions published in 1985 in English and held by 81 WorldCat member libraries worldwide

A practical atmospheric millimeter-wave propagation model (MPM) is updated and tested with experimental data from horizontal, line-of-sight links when there is no precipitation. The MPM computer program predicts attenuation and delay properties of moist air over ranges in frequency from 1 to 1000 GHz and in height from 0 to 30 km. Input variables are radio path distributions of pressure, temperature, relative humidity, and a suspended droplet concentration simulating haze and fog conditions. Terrestrial path data from millimeter-wave propagation experiments, including those from a 27 km link operated at 11.4, 28.8, and 96.1 GHz by the Institute for Telecommunication Sciences (ITS), have been analyzed. Calibrated mean signal levels permitted studies of water vapor losses. In addition, a spectral analysis was performed of clear-air scintillations caused by turbulence. In general, good agreement is obtained with the MPM for test frequencies up to 430 GHz. (Author)
A pressure-scanning refraction spectrometer for atmospheric gas studies at millimeter wavelengths by H. J Liebe( Book )

4 editions published in 1974 in English and held by 70 WorldCat member libraries worldwide

Molecular attenuation and phase dispersion between 40- and 140-GHz for path models from different altitudes, [by] H.J. Liebe and W.M. Welch by H. J Liebe( Book )

3 editions published in 1973 in English and held by 59 WorldCat member libraries worldwide

Studies of oxygen and water vapor microwave spectra under simulated atmospheric conditions by H. J Liebe( Book )

1 edition published in 1975 in English and held by 46 WorldCat member libraries worldwide

Atmospheric propagation properties in the 10- to 75-GHz region, a survey and recommendations by H. J Liebe( Book )

2 editions published in 1969 in English and held by 30 WorldCat member libraries worldwide

The expansion of telecommunication services into the millimeter wave region prompts a careful look at the limitations of the atmosphere that can give rise to severe signal degradations. In Part I the loss and scatter mechanisms in the 10- to 40- GHz range are examined. It is concluded that there is a need for further theoretical and experimental work on the atmospheric propagation properties in order to support the engineering efforts in designing reliable, useful systems. In Part II the discussions are extended to the 40- to 75 -GHz region where absorption by oxygen dominates. In this region, communication through the atmosphere is not practical; however, the oxygen absorption has a great potential for remote sensing of atmospheric variables, and for special (short-range communication) applications. Unsolved problems of the propagation medium are discussed as a basis for formulating proposals; and the objectives of an experimental program for studying oxygen dispersion and absorption are given
Untersuchungen an Gasmischungen, insbesondere Wasserdampf-Luft, mit einem digitalen Mikrowellen-Refraktometer by H. J Liebe( Book )

4 editions published in 1964 in German and held by 19 WorldCat member libraries worldwide

EHF Transfer and Shielding Properties of Air (Summary of 1974-1977 Activities) by United States( Book )

2 editions published in 1977 in English and held by 2 WorldCat member libraries worldwide

The microwave spectrum of oxygen (O2 -MS) was investigated with a pressure-scanning dual-resonator spectrometer between 53 and 64 GHz and with a nonresonant cavity spectrometer at 119 GHz under simulated atmospheric conditions. This summary is intended as a wrap-up and guide to the various outputs covering three main topics: new spectroscopic measurement technique; extensive O2 -MS laboratory studies; and engineering formulation and modeling of clear air (molecular) EHF radio path transfer properties. (Author)
Atmospheric EHF Window Transparencies Near 35, 90, 140, and 220 GHz( Book )

1 edition published in 1982 in English and held by 1 WorldCat member library worldwide

Attenuation and Phase Delay of Radio Waves in Air Below 1000 GHZ for Heights 0 to 100 KM( Book )

1 edition published in 1981 in English and held by 1 WorldCat member library worldwide

Modeling Attenuation and Phase of Radio Waves in Air at Frequencies Below 1000 GHz( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

Tropospheric Absorption and Dispersion of Millimeter and Submillimeter Waves( Book )

1 edition published in 1982 in English and held by 1 WorldCat member library worldwide

 
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Audience level: 0.58 (from 0.51 for Estimates ... to 0.99 for Tropospher ...)

Alternative Names
Liebe, Hans J.

Languages
English (55)

German (4)