Generation of Subgigawatt RF Pulses in Nonlinear Transmission Lines

Rostov, V. V.; Bykov, N. M.; Bykov, D. N.; Klimov, A. I.; Koval’chuk, O. B.; Romanchenko, I. V.

doi:10.1109/tps.2010.2048722

Cited by 47 publications

(22 citation statements)

References 5 publications

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“…The material selected for our preliminary experiment was the high-frequency NiZn ferrite of the 'soft' grade 200ВНП, with which previous writers [5][6][7] reportedly had obtained the most satisfactory results. The parameters ©The Korean Magnetics Society.…”

Section: Methodsmentioning

confidence: 99%

“…The non-linear effects accompanying propagation of pulsed electric currents through a transmission line partially filled with a ferro-or ferrimagnetic material have been studied since early 1960s [1][2][3][4][5][6][7][8], first in connection with pulse sharpening and formation of electromagnetic shocks [1,2]. Today, the attention of researchers has shifted toward direct conversion of the short video pulse into radio frequency (rf) electromagnetic oscillations which can be extracted from the generating structure in the form of high power pulsed radiation [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Today, the attention of researchers has shifted toward direct conversion of the short video pulse into radio frequency (rf) electromagnetic oscillations which can be extracted from the generating structure in the form of high power pulsed radiation [3][4][5][6][7][8]. High power electromagnetic pulses of nanosecond duration prove useful in a variety of applications, such as digital data transmission, energy transfer, radar or medical/ biological research [9].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exciting High Frequency Oscillations in a Coaxial Transmission Line with a Magnetized Ferrite

Ahn¹,

Karelin²,

Kwon³

et al. 2015

Journal of Magnetics

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The paper presents methodologies and results concerning one-and two-dimensional numerical modeling of radio frequency oscillations in a coaxial transmission line fed with a short pulse of electric current. The line is partially filled with a ferrite material, magnetized longitudinally close to saturation. The 2D model has permitted analyzing, for the first time in the art, the spatial structure and dynamics of the wave field within the radially non-uniform cross-section planes of the non-linear and dispersive guiding structure. This opens ways for optimizing size parameters of the line and the extent to which it is filled with the ferromagnetic material, thus increasing the line's electric strength and intensity of the r.f. oscillations.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exciting High Frequency Oscillations in a Coaxial Transmission Line with a Magnetized Ferrite

Ahn¹,

Karelin²,

Kwon³

et al. 2015

Journal of Magnetics

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show abstract

“…The uniqueness of such systems stems from the wide range of frequency tuning in the generated signal (that may span from hundreds of MHz to a few GHz), which is controlled only by the injected shock pulse of electric current and the external magnetic field. Recent experiments show that the output power of repeated quasiharmonic wideband (QHWB) RF signals can exceed hundreds of megawatts [4]. Obviously, the radiating antennas of such systems must possess a number of characteristics to distinguish them from traditional narrowband radiators.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the impressive history of NLTL studies [1][2][3][4][5][6][7], experiments on extracting and radiating the intense RF signals have been detailed in just a few papers, e.g. [4,5].…”

Section: Introductionmentioning

confidence: 99%

Wideband RF Radiation from a Nonlinear Transmission Line with a Pre-magnetized Ferromagnetic Core

Ahn¹,

Karelin²,

Krasovitsky³

et al. 2016

Journal of Magnetics

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Experimental results and data of numerical simulations are presented, concerning generation of wideband radio frequency (RF) oscillations in a nonlinear transmission line (NLTL) which contains a pre-magnetized core of ferrite material. Emphasis is made on the means for extracting the RF signal from the line, in order to radiate it into free space. Antennas of two types that can be used for the purpose are considered, both featuring a coaxial design. This permits availing of the principal advantages of coaxial systems, such as operation in the mode of a traveling TEM wave; wide range of the transmitted frequencies, and a reasonably simple design. The antennas studied, specifically a disc-cone dipole (DCD) and an impulse reflector antenna ('Half-IRA', or HIRA type) differ significantly in effective width of the radiated spectrum and in spatial characteristics of the radiated field in far region.

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Repetitive sub-gigawatt rf source based on gyromagnetic nonlinear transmission line

Romanchenko

Rostov

Gubanov

et al. 2012

Review of Scientific Instruments

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We demonstrate a high power repetitive rf source using gyromagnetic nonlinear transmission line to produce rf oscillations. Saturated NiZn ferrites act as active nonlinear medium first sharpening the pumping high voltage nanosecond pulse and then radiating at central frequency of about 1 GHz: shock rise time excites gyromagnetic precession in ferrites forming damping rf oscillations. The optimal length of nonlinear transmission line was found to be of about 1 m. SINUS-200 high voltage driver with Tesla transformer incorporated into pulse forming line has been designed and fabricated to produce bursts of 1000 pulses with 200 Hz repetition rate. A band-pass filter and mode-converter have been designed to extract rf pulse from low-frequency component and to form TE(11) mode of circular waveguide with linear polarization. A wide-band horn antenna has been fabricated to form Gaussian distribution of radiation pattern. The peak value of electric field strength of a radiated pulse at the distance of 3.5 m away from antenna is measured to be 160 kV/m. The corresponding rf peak power of 260 MW was achieved.

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Generation of Subgigawatt RF Pulses in Nonlinear Transmission Lines

Cited by 47 publications

References 5 publications

Exciting High Frequency Oscillations in a Coaxial Transmission Line with a Magnetized Ferrite

Exciting High Frequency Oscillations in a Coaxial Transmission Line with a Magnetized Ferrite

Wideband RF Radiation from a Nonlinear Transmission Line with a Pre-magnetized Ferromagnetic Core

Repetitive sub-gigawatt rf source based on gyromagnetic nonlinear transmission line

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