[신간안내] Computational Electrodynamics (the finite difference time - domain method)

http://ieeexplore.ieee.org/iel5/5/31314/01456639.pdf

Electromagnetic theory of gratings

The paper is focused on reliable modeling of the effects associated with the resonant transformation of the field of a plane, density modulated electron beam, flying over the periodically uneven boundary of a natural or artificial medium, in the field of volume outgoing waves. Here, the general information (analytical basis) is presented on the peculiarities and principal characteristics of electromagnetic fields arising in the situations under consideration, on the procedures for regularization of model boundary value problems describing these situations, and on possible eigen modes of periodic structures. Without relying on this information, it is impossible to advance considerably effectively in solving numerous urgent physical problems (establishing the conditions providing anomalously high levels of Vavilov-Cherenkov and/or Smith-Purcell radiation; diagnostics of beams of charged particles, artificial materials and media) and in practical implementation of new knowledge about the effects of diffraction radiation and their wave analogues in new devices and instruments of optoelectronics, high-power electronics, antenna, and accelerator technology.

/pdf/diffraction-radiation-generated-by-a-density-modulated-1bjenk5k51.pdf

Diffraction Radiation Generated by a Density-Modulated Electron Beam Flying Over the Periodic Boundary of the Medium Section. I. Analytical Basis

https://dl.begellhouse.com/download/article/6fe9ce694eea6d12/469-487.pdf

The smith-purcell effect. anomalously high level of outgoing wave excitation

the ability and advances of analytical regularization technique – that is already half of a century the trademark of Radiophysical school of IRE NAS of Ukraine- are demonstrated for solving the most advanced problems of the modern electromagnetics.

Metamaterials, Metasurfaces, FSS and EBG. Analytical Regularization Technique : Invited Paper

An axially symmetric diffraction antenna of a new type is presented and studied in details in the paper. The antenna is based on the effect of Cherenkov-like radiation. In contrast to diffraction a...

Cherenkov radiation based antenna with the funnel-shaped directional pattern

The findings of experimental investigations into and the field fests of the X-band cold, secondary — emission cathode magnetron referred to as “Buton” are presented. The primary — electron producing source in this system are the field emitters (FE). In addition to this, the data on 3-D simulation of the secondary-electron multiplication (SEM) process in this type of magnetron are given. The batch-produced “Buton” magnetrons are shown to offer an actual working capacity with 50ns to 6µs — width of e.m. radiation pulses. One of the noticeable features of these magnetrons installed in the transmitters of the lot-produced “Burevestnik-1” radar facility was their trouble-free operation time that lasted for over 12000 hours.

Petro Melezhik

Papers

Cherenkov radiation based antenna with the funnel-shaped directional pattern

Metamaterials, Metasurfaces, FSS and EBG. Analytical Regularization Technique : Invited Paper

X-band coaxial magnetron with field and secondary emitters