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Results of investigation of the spin waves propagation in micro- and nanostructures based on ferrites and ferromagnetic films are discussed. Methods of excitation and detection of the spin waves of nanometers scale are considered. The physical phenomena arising under spin waves propagation in magnetic micro- and nanostructures and promising for microwave signal processing are discussed.
In this article prospects of creations of new miniature electro vacuum amplifiers and generators of the terahertz range on the basis of vacuum integrated schemes with a field emission cathodes are considered. Analogs of such devices are classical devices of vacuum electronics with average transit angle: monotrons, reflex klystrons, klystrons with the distributed interaction. The ways to further increase...
A tapered ridge transition between coplanar waveguide and substrate-integrated waveguide is presented. The taper is implemented through staircase metallization across 10 layers of conventional RF substrate with sidewall expansion and upper cut-out using Vivaldi-type exponential tapers. Fractional bandwidth of 36% is achieved in the L-band, with insertion loss of 0.5 dB and return loss of 15 dB.
A design method for distributed element on-chip post-production tunable group delay equalising networks is presented. It is shown that a number of adjustable Darlington C-sections can be used to equalise the group delay of an arbitrary network. The C-sections are implemented in an IBM 0.13 μm BiCMOS process as complementary microstrip slotline-stub all-pass structures and modified to provide post-production...
A comparative simulation study of planar 94 GHz resonators in a typical BiCMOS BEOL stack-up is presented, with the effect of chip passivation included. It is shown that Q-factors of between 3 and 15 can be obtained, depending on transmission medium and ground plane layer choice. Straight half-wavelength and shorted quarter-wavelength microstrip resonators are shown to outperform CPW, GCPW and hairpin...
An excitation of magnetostatic surface waves (MSSW) with a one screen coplanar transmission line was considered for the case, when coplanar line is placed at some distance from the ferrite film surface. A technique is described for computing the impedance (both the reactance and radiation resistance) per unit length of a one screen coplanar transmission line. The dependence of this impedance on the...
The results of experimental investigation of diffraction profiles of magnetostatic backward volume waves (MSBVW) exited by the linear transducer with finite length located at the surface of ferrite-dielectric structure are presented. The comparison of experimental data obtained and theoretical calculations is reported.
Magnetostatic surface waves propagation in yttrium-iron garnet film with surface periodic array of grooves was studied. Effective excitation of exchange spin waves traveling along the film thickness was experimentally shown. Using micromagnetic modeling it was shown that internal magnetic field inside the film is nonuniform both in plane (periodically) and along the thickness at bias magnetic field...
The brought method of increasing to energy efficiency of the cameras of the beam type is offered different arrangement of the hybrid cameras of the beam type microwave electrotehnological of the installation.
This article is devoted to solving the actual problem of the control laser beams with a radiated power of 10 watts and above in the microwave range. Shows the solution of this problem using bulk single crystal modification Mach-Zehnder modulators. Described the use as a control element waveguide electrodynamic structure of filter type.
The investigation of small-sized decoupling microwave filter on the metamaterial are considered. The results of numerical simulation filter using AWR Design Environment (Microwave Office v.9.0) and studies of experimental model on the basis of the vector analyzer ZVB-4 is shown.
The problem of the electrodynamic analysis and synthesis of the waveguide bandpass filters on complex resonant diaphragms is solved. The aperture of diaphragm is a rectangular window with two L-shaped metal ridges. The dependences of transient characteristic of single diaphragm on frequency and aperture geometry are investigated, in particular the possibility of increase of attenuation level in a...
Frequency selective surfaces (FSS) find wide practical application in modern microwave and terahertz engineering as basic units of filters, absorbers, polarizers and etc. Some peculiarities of such metasurfaces modeling are considered in present study. Results of numerical simulations for mesh polarizers and pass-band filters on FSS are represented.
The results of studies of the transverse electric field distribution of basic and higher wave types of multirow interdigital slow wave structures with an arbitrary transverse position bounding planes are presented. A significant decrease of the higher modes amplitude is achieved by optimization of the transverse planes position.
The results of theoretical and experimental research of diffraction efficiency Bragg cells with traveling wave multielectrode transducers are presented. The equation for theoretical calculating diffraction efficiency of such acousto-optic Bragg cell is obtained. The nonlinear character of diffraction efficiency as a function of elementary transducers quantity is shown.
The article describes the development and current state of light sources based on microwave discharge with low microwave power. The analysis of electrodynamic characteristics resonators of existing light sources are made. The possibility of using dielectric resonators to create efficient light sources has been shown. The prospects of using a cylindrical dielectric cavity on oscillations E011 for resonators...
In a rigorous formulation of electrostatic solved the problem of synthesis of the transmission line (TL) with end conductor having a number of advantages in comparison with microstrip and slotted TL. The basic design relations are obtained. Shown the results of computer simulation of the proposed TL.
In this work simulated impedance composite equivalent circuit which has a similar hierarchical construction of a fractal. The influence of the depth of the fractal on the frequency dependence of the impedance.
Broadband synchronization of two coupled spin torque nano-oscillators is reported. The frequency detuning is controlled by the spin current densities, the coupling is introduced via magnetic fields generated by the oscillators, and the coupling strength corresponds to their distance. The fields are computed in a simplified form based on a dipole approximation. The synchronization is observed up to...
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