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A method of synthesis is developed, equations are derived and the results are obtained via this method for simulation of system that form intensity sheet electron beams with compression.
Main properties of terahertz electromagnetic waves and importance of its application in various radar and communication systems are considered. Klystrons as one of most perspective types of power sources are examined and its ability to work in terahertz band is discussed. Examples of millimeter and submillimeter bands klystrons are described.
The article describes the way, in which longitudinal and transverse magnetic field components adds to each other. Results of the measurement longitudinal and transverse magnetic fields are presented. Based on experiment authors determined regions in which components of the field are distributed.
We discusses the possibility of reducing the modulation noise amplifiers of superhigh frequency (UHF) for traveling wave tubes (TWT) by applying in TWT sections of asynchronous interaction. We analyzed are the amplitude and phase characteristics in different modes of operation, design of the interaction space TWT, possible ways to build amplifiers.
A modification of amplitron with substantially larger cathode area in comparison with traditional devices cylindrical structure proposed. Approximate analytical estimates showing the possible benefits of the proposed modifications given.
The paper presents the results of experimental research on the generation of wide-range microwave chaos based on TWT-generator. Researched and detected a chaotic signal absolute suppression mode external harmonic input of a certain frequency and power. This effect allows for impulse modulation of the input signal to provide the generation of chaotic microwave radio pulses.
The subject of this paper is varactor diodes for ultra-broadband microwave VCO. Here is a description of a varactor diode model based on measured data. Presented varactor model can be used in various types of CAD for accurately design broadband microwave VCO and frequency-tuning circuits.
The results of development and research magnetron designed for microwave heating, which has an output power of 3 kW, continuous operation and the anode voltage of 4.5 kV. Overall efficiency of the magnetron is not less than 80% at a magnetic field of 140–160 mT.
Optical properties of open-ended armchair single-wall carbon nanotubes (SW-CNT) are studied by numerical simulations. The polarizability tenzor as main identifier of properties was analysed for different types of SW-CNT with various lengths. It is revealed that increase in nanotube length cause an increasing of polarizability degree that leads to essential change of SW-CNT optical properties.
The paper presents results of experimental research of microwave chaos generation by cascade klystron generator. To increase chaotic band two klystrons were mechanically tuned for partial cavities frequencies overlap and connected in parallel. Researched chaotic mode suppression by external harmonic signal of certain frequency and power. This effect allows generation of chaotic microwave radio pulses...
The goal of this paper is to describe a new approach to design of electron-optical system of powerful tethrodes. Was presented the use of simulated electronic multi-beam flow this electron deceleration at anode. Using calculating o electron trajectory and experimental study was designed a cathode-grid assemble with control and acceleration grid. It was shown, that such approach it is possible to design...
A modification of magnetron with a larger area of the cathode proposed. The Approximate analytical model of short-wave magnetron develop. It is shown that the proposed modification can increase the output power of the magnetron cathode and to facilitate cooling, which is particularly important in the millimeter-wave magnetrons and short-wave end of centimeter-wave magnetrons.
For acceleration of calculating iterative process to establish the frequency in self-excited oscillator on double-gap cavity the under-relaxation quotient on the voltage is introduced. Optimal values of this quotient for minimum number of interations are determined.
The ratios presenting one-dimensional electron motion in the grouping electron current in drift tubes of a generating-amplifying klystron, allowing for operation of forces of a space charge are received.
The characteristics of electron-optic systems with plane and cylindrical cathodes and EOS with full accompaniment by magnetic field for thin sheet beam forming are discussed.
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