Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where V. I. Koshelev is active.

Publication


Featured researches published by V. I. Koshelev.


Instruments and Experimental Techniques | 2011

High-power sources of ultra-wideband radiation with subnanosecond pulse lengths

A. M. Efremov; V. I. Koshelev; B.M. Kovalchuk; V. V. Plisko; Konstantin N. Sukhushin

Sources of high-power ultra-wideband electromagnetic pulses of nanosecond duration are described. A bipolar voltage pulse with a length of 0.5 ns and an amplitude of ∼200 kV is fed to the input of a radiating system (a 16-element array antenna or a single antenna). The values of the effective radiation potential EpR = 260 kV for a source with a single antenna and EpR = 690 kV for a source with a 16-element antenna array were obtained at a pulse repetition frequency of 100 Hz.


Journal of Communications Technology and Electronics | 2011

Generation and emission of high-power ultrabroadband picosecond pulses

Yu. A. Andreev; A. M. Efremov; V. I. Koshelev; B. M. Koval’chuk; V. V. Plisko; K. N. Sukhushin

The generation and emission of high-power ultrabroadband electromagnetic pulses are studied. The possibility of high-voltage (about 100 kV) bipolar voltage pulses with a duration of about 200 ps is demonstrated. The electromagnetic pulses with a FWHM of less than 100 ps, an effective potential of up to 400 kV, and a repetition rate of 100 Hz are generated using the 16-element antenna array.


Review of Scientific Instruments | 2014

A source of high-power pulses of elliptically polarized ultrawideband radiation.

Yu. A. Andreev; A. M. Efremov; V. I. Koshelev; B.M. Kovalchuk; A. A. Petkun; K. N. Sukhushin; M. Yu. Zorkaltseva

Here, we describe a source of high-power ultrawideband radiation with elliptical polarization. The source consisting of a monopolar pulse generator, a bipolar pulse former, and a helical antenna placed into a radioparent container may be used in tests for electromagnetic compatibility. In the source, the helical antenna with the number of turns N = 4 is excited with a high-voltage bipolar pulse. Preliminary, we examined helical antennas at a low-voltage source aiming to select an optimal N and to estimate a radiation center position and boundary of a far-field zone. Finally, characteristics of the source in the operating mode at a pulse repetition rate of 100 Hz are presented in the paper as well. Energy efficiency of the antenna is 0.75 at the axial ratio equal to 1.3. The effective potential of radiation of the source at the voltage amplitudes of the bipolar pulse generator equal to -175/+200 kV reaches 280 kV.


Instruments and Experimental Techniques | 2011

A high-performance source of high-power nanosecond ultrawideband radiation pulses

Yu. A. Andreev; A. M. Efremov; V. I. Koshelev; B. M. Koval’chuk; V. V. Plisko; K. N. Sukhushin

A source of high-power nanosecond ultrawideband electromagnetic pulses is described. The 3-ns-long bipolar voltage pulse with a 90-kV amplitude is applied to the input of four-element antenna array. The effective radiation potential values EpR = 560 kV were obtained at a 100-Hz pulse repetition rate.


Journal of Communications Technology and Electronics | 2010

Dual polarization receiving antenna array for recording of ultra-wideband pulses

E. V. Balzovskii; Yu. I. Buyanov; V. I. Koshelev

The results of investigation of a 4 × 4 ultra-wideband dual polarization receiving antenna array designed for investiagtion of the polarization structure of nanosecond and subnanosecond electromagnetic pulses are presented. The elements of this antenna array are the crossed dipoles whose arms are loaded with single-stage FET amplifiers. The results of measurements of the patterns, the effective length, and the wave-forms of the recorded pulses are presented for different values of the array interelement spacing and the directions of arrival of radiation.


ieee international pulsed power conference | 1997

High-power ultrawideband electromagnetic radiation generator

Yu.I. Buyanov; A. M. Efremov; V. I. Koshelev; B.M. Kovalchuk; K. N. Sukhushin; V. A. Vizir; V.B. Zorin

High-power ultrawideband electromagnetic pulse generator construction consisting of a bipolar pulse generator and a transmitting antenna is described. Electromagnetic pulse radiation characteristics when exciting a transmitting antenna by the pulses with the voltage U/spl plusmn/100 kV, duration /spl tau//spl ap/3.5 ns, and pulse rate 100 Hz are presented.


Journal of Communications Technology and Electronics | 2013

Generation and radiation of high-power ultrawideband pulses with controlled spectrum

Yu. A. Andreev; V. I. Koshelev; I. V. Romanchenko; V. V. Rostov; K. N. Sukhushin

A pulsed source of the ultrawideband radiation based on a nonlinear line and a single combined antenna is proposed. The frequency that corresponds to the maximum radiation spectrum can be tuned in the interval 0.5–1.3 GHz. The effective radiation potential of the source is 95–310 kV.


Instruments and Experimental Techniques | 2013

A four-channel source of high-power pulses of ultrawideband radiation

A. M. Efremov; V. I. Koshelev; B. M. Kovalchuk; V. V. Plisko

A source of nanosecond ultrawideband radiation is described. Four output bipolar pulses from the source can be synchronized with an rms deviation of less than 100 ps in the time of the voltage passage through zero or delayed by the moment of this passage in some pulse formers relative to other ones by a time of up to 300 ps using the pressure control in two-electrode discharge switches. At a 3-ns bipolar-pulse length, the obtained values of the effective potential of radiation at a pulse repetition rate of 100 Hz were 400 kV. The possibility of the wave-beam steering within limits of 12° was demonstrated.


ieee international pulsed power conference | 2003

High-power ultrawideband electromagnetic pulse source

Yu. A. Andreev; V.P. Gubanov; A. M. Efremov; V. I. Koshelev; S.D. Korovin; B.M. Kovalchuk; V.V. Kremnev; V. V. Plisko; A.S. Stepchenko; K. N. Sukhushin

The source of high-power ultrawideband (UWB) radiation based on single compact antenna excited with 1-ns bipolar pulse has been created. Antenna input pulse amplitude is up to 120-kV and pulse repetition rate up to 100 Hz. The antenna efficiency by peak power was 60%. The peak power of the source was 170 MW. The antenna pattern width by half-power is 100/spl deg/ for the H-plane and 105/spl deg/ for the E-plane. The efficient voltage of the source equal to product of the peak field strength and the distance made /spl sim/130 kV.


ieee international pulsed power conference | 1999

Gigawatt-power-level ultrawideband radiation generator

Yu. A. Andreev; Yu. I. Buyanov; V. I. Koshelev; B.M. Kovalchuk; V. V. Plisko; K. N. Sukhushin; V. A. Vizir; V.B. Zorin

An ultrawideband electromagnetic radiation pulse generator of peak power up to 1.3 GW and pulse repetition rate of 100 Hz has been developed and investigated. The generator consists of a high-voltage source of 200-kV bipolar voltage pulses of /spl sim/3-ns duration and a four-element antenna array. To increase the electric strength, the antennas were placed in dielectric containers under the gauge pressure of SF/sub 6/ gas. The array efficiency by peak power was /spl les/50%. The width of the wave beam of vertically polarized radiation at the power half-level in two mutually perpendicular planes was about 45/spl deg/.

Collaboration


Dive into the V. I. Koshelev's collaboration.

Top Co-Authors

Avatar

V. V. Plisko

Russian Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

A. M. Efremov

Russian Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Yu. A. Andreev

Russian Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

K. N. Sukhushin

Russian Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

B.M. Kovalchuk

Russian Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Yu. I. Buyanov

Russian Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

A. A. Petkun

Russian Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

V. A. Vizir

Russian Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

V.B. Zorin

Russian Academy of Sciences

View shared research outputs
Researchain Logo
Decentralizing Knowledge