Results 241 to 250 of about 54,360 (285)

Klinoorbictron - terahertz range oscillator

2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES, 2010
Based upon the developed program that allows for the deposition of current on the slow-wave structure (SWS) the optimal parameters of a 3-mm wave orbictron and klinoorbictron operating at a 3-kV electron beam voltage have been calculated. The beam stratification effect in an orbictron has been studied.
Victor D. Yeryomka, Alexandr V. Gurevich, Alexandr A. Kurayev, Anatoliy K. Sinitsyn   +3 more
openaire   +1 more source

Terahertz spectroscopic investigations of leather in terahertz wave range

SPIE Proceedings, 2012
Pulsed THz time-domain spectroscopy is a coherent technique, in which both the amplitude and the phase of a THz pulse are measured. Recently, material characterization using THz spectroscopy has been applied to biochemicals, pharmaceuticals, polymers and semiconductors and has given us important information.
Mei-jing Song, Jiu-sheng Li
openaire   +1 more source

Terahertz range coaxial klinoorotron oscillator

2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES, 2010
The coaxial klinoorotron with inhomogeneous focusing magnetic field in which the klinotron effect is applied to improve the efficiency of energy exchange between the tubular electron beam and electromagnetic field of the open coaxial cavity is investigated.
A.A. Kurayev, A.K. Sinitsyn, A.O. Rak, V.D. Yeryomka   +3 more
openaire   +1 more source

Terahertz-range quantum well photodetector

SPIE Proceedings, 2005
We have designed and fabricated GaAs/AlGaAs QWIP photodetector for THz range of spectrum (3THz, 100 μm). To evaluate suitability of this type of detector for real-time THz imaging, a prototype of a small array have been built by integrating detector elements with cryogenic readout electronics.
M. Patrashin, I. Hosako, P. Merken
openaire   +1 more source

Explosives characterization in terahertz range

SPIE Proceedings, 2011
A Thz spectral characterization of the behaviour of different explosives is presented in this paper. This characterization will be done in the frequency range from 20 GHz to 4 THz using a Teraview Spectra 3000. This system has a capacity of measuring from 20 GHz to 4 THz fed by a laser source. With the Teraview Spectra 3000 equipment will be possible
I. Maestrojuán, I. Palacios, D. Etayo, J. C. Iriarte, J. Teniente, I. Ederra, R. Gonzalo   +6 more
openaire   +1 more source

Terahertz Radar with High Resolution Range Profile

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2021
In this paper, the performance of terahertz (THz) radar based on high resolution range profile (HRRP) is described. This terahertz radar, developed for the high resolution imaging under the complex environment such as sand-dust weather and so on, operates at 230GHz over multiple GHz of bandwidth.
Jialin Mei, Zhaoyang Li, Chong Yi, Jingshui Zhang, Yupeng Wang, Mingyuan Sun   +5 more
openaire   +1 more source

Terahertz frequency range band-stop filters

Applied Physics Letters, 2005
We report the operation of band-stop filters in the terahertz (THz) frequency range, working at a center frequency of 600GHz. The filters were characterized by embedding them in a microstrip line attached to photoconductive switches which act as THz emitters and detectors. The filters have applications in sensing and detection. The chosen filter design
J. Cunningham, C. Wood, A. G. Davies, I. Hunter, E. H. Linfield, H. E. Beere   +5 more
openaire   +1 more source

Chirp-Pulse Terahertz Range Profiling

2007
Abstract : Terahertz (THz) range profiling is investigated for several cm-size metal targets. Aperiodically-poled lithium niobate crystals are used to generate a chirp-pulse THz signal, which is used to probe several targets. The reflected waveforms from different targets show distinctive features that permit differentiation of the targets.
X.-C. Zhang, Jeffrey M. Warrender, Wei Lang   +2 more
openaire   +1 more source

Spectral Holograms in the Terahertz Range

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1996
Abstract We review recent works on temporal frequency holograms. The role of white light excitation is stressed. The interferometric data retrieval technique is emphasized. Both the photorefractive crystals and the persistent spectral hole burning amorphous materials are considered as spectral holography media.
J.-L. Le. Gouët, F. Grelet, I. Lorgere, M. Rätsep, M. Tian, M.-L. Roblin, C. Sigel   +6 more
openaire   +1 more source

Wireless Communication Systems of Terahertz Frequency Range

2021
One of the trends in the development of modern wireless systems is the application of the terahertz frequency range. The terahertz range occupies an intermediate position between the well-studied microwave and optical ranges of the electromagnetic radiation spectrum.
M. Ilchenko, T. Narytnyk, G. Avdeyenko
openaire   +1 more source