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The problem of the field diffraction of radial electrical current ring on a spiral conductive sphere with a hole has been solved. The current ring is placed outside the supplement of a sphere with a hole to a closed hollow sphere. The method of operator semi-inversion of the problem, the method of separation of variables in the spherical system coordinates and of the solution of Abel integral equations...
The influence of various types of apodization on the eigen parameters of the distributed Bragg reflector, layered Bragg reflectors and resonators has been analyzed. The conditions of reduction of the quality factor of unwanted side Bragg oscillations in quasiperiodic apodized resonators have been determined. It has been proposed the construction of periodic and quasiperiodic structures and apodized...
The paper examines the characteristics of antenna monopoles formed on the basis of discretely-curvilinear fractal ring. Analysis of the frequency dependence of the input impedance and standing wave ratio was performed.
The results of the simulation of electromagnetic characteristics of a microstrip disk resonator with shorting-vias with ground plane are presented. The influence of the number of shorting-vias and their geometrical location, with respect to the geometrical disc centre, on the integral characteristics of the radiating element have been investigated. In contrast to the well-known works, special attention...
Scattering characteristics of a waveguide section with a pair of antipodal posts are studied. The section is formed by two short rectangular inserts arranged in antipodal position in a cross section of a rectangular waveguide. Influence of changing the posts' dimensions on the section frequency response is numerically investigated. A pole generation mechanism is examined within the concept of the...
Two printed antennas (f1=1.85GHz; f2=3.7GHz) made in the same form factor for the nonlinear locator has been determined. The first tests of antennas in a network of the nonlinear locator showed the ability to detect a variety of radio-electronic devices.
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