Journal•ISSN: 0195-9271
International Journal of Infrared and Millimeter Waves
Springer Science+Business Media
About: International Journal of Infrared and Millimeter Waves is an academic journal. The journal publishes majorly in the area(s): Laser & Gyrotron. It has an ISSN identifier of 0195-9271. Over the lifetime, 3764 publications have been published receiving 29710 citations.
Topics: Laser, Gyrotron, Far-infrared laser, Dielectric, Resonator
Papers published on a yearly basis
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TL;DR: In this paper, the authors characterized the neutral atmosphere for the frequency range from 1 to 300 GHz as a nonturbulent propagation medium and predicted attenuation and propagation delay effects from meteorological data sets: pressure, temperature, humidity, suspended particle concentration, and rain rate.
Abstract: 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 02 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 atmospheres provide basic millimeter wave propagation information over the height range 0 to 100 km of the neutral atmosphere.
705 citations
TL;DR: In this paper, experimental permittivity data of liquid water, compiled from the open literature, were selectively applied to support a modeling strategy, which was carried out by employing nonlinear least-squares fitting routines to data considered reliable.
Abstract: Experimental permittivity data of liquid water, compiled from the open literature, were selectively applied to support a modeling strategy. Frequencies up to 1 THz and atmospheric temperatures are covered with an expression made up by two relaxation (Debye) terms. The double-Debye model reduces to one term when the high frequency limit is set at 100 GHz, and the model can be extended to 30 THz by adding two resonance (Lorentzian) terms. The scheme was carried out by employing nonlinear least-squares fitting routines to data we considered reliable.
607 citations
TL;DR: Several parameters of various materials, including solid and foam dielectrics, absorbers, and metals, are collected for use in optical design in the millimetre and submillimetre range.
Abstract: Several parameters of various materials, including solid and foam dielectrics, absorbers, and metals, are collected for use in optical design in the millimetre and submillimetre range. Although the list is not exhaustive it covers most of the important materials and parameters, and extensive references are given.
376 citations
TL;DR: In this article, the specific rain attenuation calculated by the analytic expressions are also in high agreement with those by the values of k and α tabulated by ITU-R.
Abstract: Based on the values of k and α given by ITU-R for the power-law relationship of specific rain attenuation γR=kRα, the analytic expressions for k and α are regressed as a function of frequency and are in high agreement with the values tabulated. The specific rain attenuation calculated by the analytic expressions are also in high agreement with those by the values of k and α tabulated. Comparisons with other analytic expressions show that the ones in this paper are more accuracy and simple.
339 citations
TL;DR: The terahertz time domain spectroscopy (THz-TDS) as mentioned in this paper has been used extensively in the characterization of solids, such as semiconductors, superconductors, polymers, and photonic crystals.
Abstract: Recent development of the terahertz time domain spectroscopy (THz-TDS) and its application to solids have been reviewed. This spectroscopy is unique in that the time-domain wave forms are measured at first and the complex optical constants are deduced directly by the Fourier transformation of them without resort to the Kramers-Kronig analysis. Various types of the THz-TDS systems are briefly described. Applications of the THz-TDS to various solids, i.e., semiconductors, superconductors, polymers, photonic crystals, and so on are also presented to demonstrate how widely this spectroscopy is applicable to characterization of solids.
233 citations