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Study of high frequency harmonics propagation in industrial networks
International Symposium on Electromagnetic Compatibility - EMC EUROPE, 2012This paper investigates the harmonic contents of an industrial network in the 2kHz–150kHz range. Measurement methods to characterize the ElectroMagnetic Interferences in this frequency range are proposed, using voltage or current. The harmonic propagation in the power networks is studied and discussed.
D. Frey +4 more
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Development of high frequency, cyclotron harmonic gyrotron oscillator
Physics Letters A, 1988Abstract The oscillation results of a high frequency gyrotron which operates at the fundamental cyctron frequency and its higher harmonics ( s =1, 2, 3) are described. The fairly high frequency of 220 GHz (corresponding wave length 1.35 mm) has been achieved at the fundamental and second harmonic of the cyclotron frequency.
Toshitaka Idehara +5 more
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A Hybrid Filter Topology for a Reduction of High Frequency Harmonics
2012In this paper a hybrid filter topology for the reduction of the total harmonic distortion in AC sources is introduced. The hybrid filter contains active and passive components. The structure of the digital filter influencing the signals gain and phase will be explained.
J. Bergmann +3 more
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Component modeling for high-frequency harmonic analyses in the scenario of smart grids
2012 IEEE 15th International Conference on Harmonics and Quality of Power, 2012The smart grids development implies large penetration of distributed generation and ancillary services apparatuses. This requires accurate network component models in a frequency range much wider than the classical interval, 0–2.5 kHz, used for traditional harmonic and interharmonic penetration studies.
LANGELLA, Roberto +2 more
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Reduction of stent artifacts using high-frequency harmonic ultrasound imaging
Ultrasound in Medicine & Biology, 2005Tissue harmonic imaging (THI) has been shown to improve medical ultrasound (US) image quality in the frequency range from 2 to 10 MHz and might, therefore, also be advantageous in high-frequency US applications, like US biomicroscopy and intravascular US (IVUS).
Frijlink, ME (Martijn) +2 more
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High-frequency even harmonics generation in a plasma with electron heat flux
Physics Letters A, 2004It is shown that in a weakly nonuniform plasma with electron heat flux the generation of odd and even harmonics of high frequency radiation is possible. The even harmonics properties qualitatively differ as compared to those of odd harmonics and depend in an essential way on the heat flux value and orientation with respect to the fundamental wave ...
G. FERRANTE +2 more
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High-frequency harmonics and source level of humpback whale songs
The Journal of the Acoustical Society of America, 2001The songs of 8 male humpback whales were recorded at ranges varying from 20 to 40 m with a calibrated system that had a flat frequency response to 22 kHz. The songs consisted of bursts of sounds called units. Units were organized into phrases and phrases into themes.
Whitlow Au +2 more
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Parametric generation of high-frequency harmonics in semiconductor superlattices
Semiconductors, 2012The behavior of the semiconductor superlattice in a biharmonic quasi-static electric field containing a static component is studied. Analytical expressions for the high-frequency response are derived. The possibility of the parametric generation of high-frequency harmonics in the domainless mode in superlattices with various degrees of dissipation is ...
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CARDIOVASCULAR HARMONICS DURING HIGH FREQUENCY VENTILATION
Critical Care Medicine, 1982Frank R. Gioia +3 more
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