65 research outputs found
A BROADBAND PATCH ANTENNA BASED ON A PLANAR UNCLOSED ANNULAR RADIATOR
Subject and Purpose. Results are presented of numerical simulation of a patch antenna in the form of a planar unclosed annular radiator placed above an earthed plane. The work has been aimed at optimizing the key parameters of the antenna, like the degree of its matching with external circuits, achievable through proper selection of the excitation method and variation of the substrate permittivity, antenna gain, and power and polarization characteristics.
Methods and Methodology. The antenna has been designed as an unclosed annular strip line. The angular width of the gap in the ring was varied during the optimization process. The antenna is excited via a segment of a coplanar line. The numerical simulation was performed for the unclosed resonator model, with all the limitations imposed on the model in the framework of the finite element method. The performance characteristics of the antenna have been optimized with account of the return loss level, gain magnitude and ellipticity over the given frequency range.
Results. Frequency and power characteristics of the patch antenna based on an unclosed annular strip-line radiator have been analyzed and optimized over a broad frequency range. The impact of key parameters of the structure upon its performance characteristics has been established, specifically of the angular width of the gap in the unclosed ring, separation from the ground plane, and dielectric permittivity value in the substrate. The possibility has been demonstrated of generating radiation fields of an elliptical polarization which is rather close to circular.
Conclusions. The frequency, spectral and power characteristics studied of a patch antenna built around a planar unclosed annular strip-line radiator above an earthed plane. The numerical modeling was performed within the framework of the finite element method. The principal dependences of the antenna’s electrodynamic performance upon such parameters as geometry, characteristic dimensions and material constants have been condsidered. The results obtained allow suggesting application of such antennas in the capacity of both independent radiators and elements of phased antenna arrays
The Radiating Unit Based on Hybrid Metal-Dielectric Structure with Bounded Sequence of Transverse Slots
Abstract The structure which consists of the five transverse slots based on inverted dielectric waveguide was experimentally investigated. The possibility of creat ing an antenna on the basis of the above mentioned waveguide with an acceptable radiation pattern and good agreement feed line and antenna are presented
Diffraction of Natural Waves of an Isolated Mirror Dielectric Waveguide at a Semi-Infinite System of Microstrip Resonators
ON THE CHOICE OF OPTIMAL TOPOLOGY OF A REFLECTING MODULE BASED UPON THE CIRCULAR-DISK MICROSTRIP STRUCTURE
ELECTRODYNAMIC CHARACTERISTICS OF THE DISK MICROSTRIP RADIATOR WITH STRUCTURAL AUXILIARY ELEMENTS
OPERATOR METHODS IN THE PROBLEM OF WAVE DIFFRACTION BY TWO GRAPHENE STRIPS LOCATED WITHIN PARALLEL PLANES
OPTIMIZATION OF THE INTEGRAL PARAMETERS OF DISK MICROSTRIP ANTENNAS WITH RADIATORS OF COMPLEX GEOMETRY
CALCULATION OF DIELECTRIC ELECTRONEGATIVE METAMATERIAL PROPERTIES IN A CIRCULAR MULTILAYERED DIELECTRIC WAVEGUIDE
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