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Antenna Array


Antenna array

Complex directional antenna consists of separate near-omnidirectional antennas (radiating elements) positioned in the space and driven by high-frequency …

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Matching waveguide radiators in antenna arrays with broadband and wide-angle scanning



We present a method for matching waveguide radiators used in wide bandwidth phased antenna arrays with wide-scanning angle. In order to achieve matching, the following parameters are used: the geometrical parameters of waveguides, the dielectric parameters of materials inside the waveguides, waveguide transformators and reactive waveguide ...

Modified: 04/06/2008
Tags: waveguide , radiator , antenna array , broadband , scanning
Path: Home / Publications / Archives / 2008 / Matching waveguide …



Broadband waveguide radiators in phased antenna arrays with circular polarization



It is presented the electrodynamics analysis of complex cross-section waveguide phased-array antennas with dual polarization. Energetic, polarization and frequency characteristics of cross-ridged circular and square waveguides as elements in phased-array antennas with dielectric covers and supports are studied. An analysis chart is introduced to aid the computation of their mode of operation with sector scanning and frequency band. Antennas

Modified: 04/05/2008
Tags: broadband , waveguide , radiator , antenna array , PAA , polarization
Path: Home / Publications / Archives / 2008 / Broadband waveguide …



Broadband waveguide radiators in phased antenna arrays with linear polarization



Phased antenna arrays (PAA) of waveguides with complex cross sections are analyzed in this work. Particularly, the analysis focuses on linearly polarized waveguides with dielectric matching units (inserts, covers and waveguide transformers). The study of power ...

Modified: 04/04/2008
Tags: broadband , waveguide , radiator , antenna array , PAA , polarization
Path: Home / Publications / Archives / 2008 / Broadband waveguide …



The method of estimating longitudinal printed-circuit oscillator in flat-plate phased arrays



The method for estimating the characteristics of longitudinal printed-circuit oscillators in phased arrays with the help of a model in the form of an infinite flat-plate array antenna. Antennas

Modified: 03/29/2008
Tags: antenna array , model , method
Path: Home / Publications / Archives / 2008 / The method …



Results of the numeric modeling of a microstrip stub reflector-array antenna



The numerical research results of scattering characteristics of a microstrip–stubs reflectarrays, which have obtained due to a mathematical model, developed by the authors, are represented. The mathematical model of a reflectarray allows introducing into a construction of each microstrip element some shunts with controllable loads. It is shown, that due to shunts it is possible to control amplitude and phase of a scattering fields. Antennas

Modified: 03/28/2008
Tags: model , microstrip , antenna array , field
Path: Home / Publications / Archives / 2008 / Results of the …



Numeric modeling of microstrip array antennas out of longitudinal broadband oscillators



The mathematical model of longitudinal printed radiators phased antenna array is developed based on integral equations method of electrodynamics. Numerical results and measurements of broadband microstrip radiators of the phased antenna arrays characteristics are presented. The obtained results can be used at designing ...

Modified: 03/27/2008
Tags: modeling , microstrip , antenna array , broadband , oscillator
Path: Home / Publications / Archives / 2008 / Numeric modeling …



Wave diffraction by a stripline array with passive loads



The algorithm of estimating the density of surface magnetic current induced on the array aperture has been obtained as a result of the rigorous solution of the problem of plane wave diffraction on a double periodic array of stripline elements of any shape with passive loads. Electromagnetic wave diffraction

Modified: 03/26/2008
Tags: wave , diffraction , current , antenna array
Path: Home / Publications / Archives / 2008 / Wave diffraction …



Mathematic modeling of the antenna array composed of microstrip radiators above an impedance surface of a generalized cylinder



Asymptotic solution for the diffraction problem on a periodic array of microstrip radiators located above the surface of an infinite generalized cylinder, the curvature radius of which satisfies the condition of slow change along the guide, is considered. By using the matrix reflectivity coefficients, the problem is solved assuming the multilayer isotropic dielectric coating is present. For partial excitation the electric Green tensor function of Maxwell equations is written in closed form, which...

Modified: 11/24/2007
Tags: modeling , antenna array , microstrip , radiator impedance , surface , cylinder
Path: Home / Publications / Archives / 2007 / Mathematic modeling …



Impedance and polarizational characteristics of rectangular printed-circuit radiators in plane phased antenna arrays



This work considers results of research of characteristics of rectangular printed-circuit radiators in plane phased antenna arrays. The research is conducted by using computer modeling and the mathematical model described in [1]. Proceedings of institutes of MV and SSO USSR. Radioelectronics

Modified: 11/23/2007
Tags: impedance , polarization , rectangular , radiator , antenna array
Path: Home / Publications / Archives / 2007 / Impedance and …



Research of director radiators in convex cylindrical antenna array



Based on the asymptotic theory, characteristics of convex cylindrical antenna array consisting of director radiators are studied. To determine the distribution of currents of the radiator vibrators, the numeric projective method is used. Results of numeric computations are presented. Proceedings of institutes of MV and ...

Modified: 11/22/2007
Tags: research , antenna array , asymptotic , vibrator
Path: Home / Publications / Archives / 2007 / Research of director …



Mutual relation in convex cylindrical antenna arrays of arbitrary form composed of aperture radiators



Based on the asymptotic diffraction theory methods, the problem of determining the near field of the convex cylindrical antenna array composed of aperture radiators is reduced to the boundary value problem in the single cell of the array, which is solved using the Galerkin method. The asymptotic theory is further developed, which provides representation of the radiator ...

Modified: 11/21/2007
Tags: antenna array , asymptotic , diffraction , Galerkin
Path: Home / Publications / Archives / 2007 / Mutual relation …



Characteristics of printed-circuit radiators having circular polarization in a plane phased antenna array



Results of numeric modeling of impedance and polarizational characteristics of single-channel printed-circuit radiator having circular polarization in the base of the antenna array are presented. Possibilities for optimizing the characteristics in the frequency band and scanning angle sector. Proceedings of institutes of MV and SSO USSR. Radioelectronics

Modified: 11/20/2007
Tags: antenna array , modeling , impedance , polarization
Path: Home / Publications / Archives / 2007 / Characteristics of printed-circuit …



Mathematical model and results of research of characteristics of printed-circuit radiators in plane phased antenna arrays



The results of research of characteristics of printed-circuit radiators in a plane phased antenna array is presented, based on the infinite plane antenna array model. Antennas

Modified: 11/05/2007
Tags: model , research , radiator , antenna array
Path: Home / Publications / Archives / 2007 / Mathematical model …



Antenna array equations



Equations for waveguide, impedance and lens antenna arrays are formulated taking into account excitation conditions and interconnection between radiators. The arrays can be located on flat or curved surfaces. Antenna arrays

Modified: 04/19/2007
Tags: antenna array , equation , waveguide , lens
Path: Home / Publications / Archives / 2007 / Antenna array …



Some problems of synthesis of matching circuits of broadband radiators of phased antenna arrays



Partly systematizes the process of constructing of reactive chains of matching of broadband phased array radiators in the sector of angles and frequency band using Fano-Ula limitations. The given formulae can also be used when designing matching and correcting devices for wide application antennas.

Modified: 11/30/2006
Tags: synthesis , matching , broadband , radiator , antenna array
Path: Home / Publications / Archives / 2006 / Some problems …



Applying integral equations for polarization currents to the analysis of waveguide array with projected dielectric elements



The infinite array of stepped plane-parallel waveguides with dielectric inserts and projected dielectric elements, excited by TEM-waves is analyzed in this article using the integral equation for electric field (polarization current) in the projected element and field linking method in the horn; the differential equation is solved using the Galerkin method using vector waves of the corresponding resonator as basis and weight functions; numerical results characterizing the suggested algorithm and...

Modified: 12/30/2005
Tags: integral equation , polarization , current , analysis , waveguide , antenna array , dielectric
Path: Home / Publications / Archives / 2005 / Applying integral …



The theory of horn antenna arrays (immersion method)



It is obtained a new way to solve the problem of calculating radiation of horn antenna arrays, which is based on using the immersion method; the system of horns is considered a transition layer, coordinating the waveguides with the empty space and characterized by the matrix transparency coefficient. When deriving the immersion ...

Modified: 12/13/2005
Tags: horn , antenna array , immersion method
Path: Home / Publications / Archives / 2005 / The theory …


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