Certified dual-corrected radiation patterns of phased antenna arrays by offline–online order reduction of finite-element models

2015 ◽  
Vol 299 ◽  
pp. 22-44 ◽  
Author(s):  
A. Sommer ◽  
O. Farle ◽  
R. Dyczij-Edlinger
Keyword(s):  
Finite Element ◽  
Antenna Arrays ◽  
Order Reduction ◽  
Finite Element Models ◽  
Radiation Patterns ◽  
Phased Antenna Arrays

scholarly journals Features of excitation reconstruction in flat multielement phased antenna array face using dynamic directional patterns

2017 ◽  
pp. 32-39
Author(s):  
S. E. Gavrilova ◽  
A. N. Gribanov ◽  
G. F. Moseychuk ◽  
A. I. Sinani
Keyword(s):  
Antenna Arrays ◽  
High Efficiency ◽  
Phase Distribution ◽  
Radiation Patterns ◽  
Phased Array Antennas ◽  
Phased Antenna Arrays ◽  
Phased Antenna Array ◽  
Transformation Algorithms ◽  
Computational Resources ◽  
Research Show

The study focuses on reconstructing the amplitude-phase distribution of flat multielement passive and active phased antenna arrays with the use of dynamic radiation patterns, measured with electronical scanning without mechanical rotations and antenna movements. The paper describes the measurement settings of dynamic radiation patterns, necessary for reconstructing the amplitude-phase distribution. Findings of the research show that to reconstruct the amplitude-phase distribution according to dynamic radiation diagrams, there is no need for increased computational resources due to the use of Fourier transformation algorithms. After the method was experimentally verified on the specific samples of active phased antenna arrays, its high efficiency was established. The paper gives the examples of reconstructing the amplitude-phase distribution from dynamic radiation patterns in the presence of malfunctions in active phased array antennas.

AUTOMATIC ORDER REDUCTION FOR FINITE ELEMENT MODELS

2005 ◽  
Author(s):  
ANDREAS GREINER ◽  
JAN LIENEMANN ◽  
EVGENII RUDNYI ◽  
JAN G. KORVINK ◽  
LORENZA FERRARIO ◽  
...  
Keyword(s):  
Finite Element ◽  
Order Reduction ◽  
Finite Element Models

Methodology for the Efficient Analysis of Thermal and Thermo-Elastic Behaviour of Machine Tools

2014 ◽  
Vol 1018 ◽  
pp. 395-402 ◽  
Author(s):  
Knut Großmann ◽  
Alexander Galant ◽  
Marcel Merx ◽  
Mirko Riedel
Keyword(s):  
Finite Element ◽  
Machine Tools ◽  
Order Reduction ◽  
Computational Effort ◽  
Elastic Behaviour ◽  
Limiting Factor ◽  
Finite Element Models ◽  
Model Matching ◽  
Thermally Induced ◽  
Improve Model

Thermally induced deviations become the limiting factor for the precision of machine tools. Structure-based finite-element models of high resolution can estimate these deviations with high accuracy but have also a high computational effort. With model order reduction (MOR) these models can be converted into structure-preserving reduced-order finite-element models (FEM-MOR-models) which can be solved very efficiently in MATLAB/Simulink®. To improve model matching selective thermography is used. Selective thermography is a measurement method providing high structural resolution and minimal instrumentation expense due to the use of thermography and photogrammetric methods.

scholarly journals Generalized characteristics of expanded sector beams formed by phased antenna arrays obtained by scaling phase distributions

2020 ◽  
pp. 46-54
Author(s):  
O. V. Pavlovich ◽  
A. N. Gribanov ◽  
S. E. Gavrilova ◽  
G. F. Moseychuk ◽  
I. A. Kuznetsov
Keyword(s):  
Radiation Pattern ◽  
Antenna Arrays ◽  
Angular Distance ◽  
Radiation Patterns ◽  
Phase Synthesis ◽  
Generalized Characteristics ◽  
Phased Antenna Arrays ◽  
Phased Antenna Array ◽  
Expansion Coefficients ◽  
The Difference

This paper considers specific features of the phase synthesis of expanded sector beams formed by phased antenna arrays by the method of fan partial diagrams. Partial radiation patterns are formed by pairs of adjacent emitters. The synthesis results have the property of scaling, which allows many expansion options to be obtained on the basis of one expansion option. This is achieved by multiplying the phase shift values of the signals from all emitters by the same value. It is shown that, when the beam expands along the sum channel, a radiation pattern with an extended angular distance between the maxima is formed in the difference channel. An analysis of the initial sections of the difference radiation patterns in the formation of expanded beams of the sum radiation pattern was conducted. The behaviour of the generalized characteristics of expanded beams across the range of expansion coefficients was analysed. The conclusion was made about the possibility of timely and predictable control of the width of the difference radiation pattern of a phased antenna array

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