scholarly journals Error Analysis and Simulator in Cylindrical Near-Field Antenna Measurement Systems

10.5772/8735 ◽  
2010 ◽  
Author(s):  
Burgos Sara ◽  
Sierra-Castaner Manuel ◽  
Martin Fernando ◽  
Cano Francisco ◽  
Besada Jose
Keyword(s):  
Error Analysis ◽  
Near Field ◽  
Antenna Measurement ◽  
Measurement Systems

scholarly journals Examination of Far-Field Mathematical Absorber Reflection Suppression through Computational Electromagnetic Simulation

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
S. F. Gregson ◽  
A. C. Newell ◽  
G. E. Hindman
Keyword(s):  
Near Field ◽  
Three Dimensional ◽  
Test System ◽  
General Purpose ◽  
Far Field ◽  
Antenna Measurement ◽  
Compact Antenna ◽  
Measurement Systems ◽  
Electromagnetic Model ◽  
Spherical Antenna

The mathematical absorber reflection suppression (MARS) technique has been used to identify and then suppress the effects of spurious scattering within spherical, cylindrical, and planar near-field antenna measurement systems, compact antenna test ranges (CATRs), and far-field measurement facilities for some time now. The recent development of a general-purpose three-dimensional computational electromagnetic model of a spherical antenna test system has enabled the MARS measurement and postprocessing technique to be further investigated. This paper provides an overview of the far-field MARS technique and presents an introduction to the computational electromagnetic range model. Preliminary results of computational electromagnetic range simulations that replicate typical MARS measurement configurations are presented and discussed which, for the first time, confirm through simulation many of the observations that have previously been noted using purely empirical techniques.

Experimental comparison of absorber and conductive floor automotive near field antenna measurement systems

2021 ◽  
pp. 1-12
Author(s):  
F. Saccardi ◽  
F. Mioc ◽  
A. Scannavini ◽  
P. O. Iversen ◽  
J. Estrada ◽  
...  
Keyword(s):  
Free Space ◽  
Near Field ◽  
Experimental Comparison ◽  
Antenna Measurement ◽  
Measurement Systems ◽  
Figures Of Merit ◽  
Floor Systems ◽  
Different Dimensions ◽  
The Impact ◽  
Space Conditions

Abstract Large truncated spherical near-field systems with conductive or absorbing floors are typically used in the measurement of the performances of vehicle-installed antennas. The main advantage of conductive floor systems is the ease of accommodation of the vehicle under test, but their performances are affected by the interaction with the reflecting ground floor. Instead, absorbing-based systems emulating free-space conditions minimize the effect of the interaction with the floor, but generally require longer setup times, especially at lower frequencies (70–400 MHz), where bulky absorbers are typically used to improve reflectivity levels. Considering scaled measurements of a vehicle model, the performances of these two typical implementations are analyzed in the 84–1500 MHz range and compared to free-space measurements. Absorbers with different dimensions and reflectivity have been installed in the scaled measurement setup, and measured data have been investigated with proper post-processing to verify the applicability to realistic systems. Figures of merit of interest for automotive applications, like gain and partial radiated powers, have been compared to free-space to evaluate the impact of different scenarios.

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