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Nowadays, the actual problem of development and usage of mobile communication devices is to solve problems of optimization of structures and characteristics of antennas of mobile terminals. One of the key criteria for evaluating the operation of the mobile terminal, operating near a human, the accepted value is SAR - Specific Absorption Rate. The purpose of this work is to study the dependence of...
An algorithm is considered for calculating the EM field of dipole in case of arbitrary spacing between the point of dipole location and the point of its field observation, as well as arbitrary distance of points from the boundary of dielectric half-spaces. The algorithm is adapted to the height of mentioned points above the boundary and allows to reduce significantly calculation time while providing...
In this paper, the aperture X-band antenna with a hybrid dielectric insertion has been proposed. It is shown that the use of cylinders with different permittivities inside the dielectric matrix and a specific topology in their location gives rise to the significant extension of the operational frequency band up to 2.3GHz and varying the elevation angle of peak directivity in the H-plane.
Nonlinear dielectrics with controllable permittivity are subject of intense studies and begin to find broad applications in device technology and electronics, where both the radio and optical frequency ranges are of interest. We develop a model of resonance scattering and generation of waves on an isotropic nonmagnetic nonlinear layered dielectric structure excited by packets of plane waves in the...
The paper analyzes the methods of determining the electromagnetic fields in waveguide-slot structures with dielectric insertions. In a rigorous formulation of the problem cases of single slots and multi-slot systems are analyzed. The elongated dielectric insertions s (in the form of infinitely long layers) and local ones (a “plug” of finite length which completely covers the cross-section of the waveguide)...
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