Correlate measurements at different test sites

Fourestie, B.; Altman, Zwi; Wiart, Joe; Azoulay, Alain

doi:10.1109/8.805901

Cited by 47 publications

(8 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Suitable techniques are based on, e.g., (i) one-shot multi-frequency measurements, or (ii) test site characterization [10]- [16], [21]- [23]. The first class comprises time-domain methods, where the fraction of the RA-AUT signal that corresponds to the Line-of-Sight (LoS) transmission is extracted from noisy responses [12]- [16]. Post-processing can also be performed using the spectral approaches [16], [21]- [23].…”

Section: Introductionmentioning

confidence: 99%

Automatic Correction of Nonanechoic Antenna Measurements Using Complex Morlet Wavelets

Bekasiewicz,

Waladi

2024

Antennas Wirel. Propag. Lett.

View full text Add to dashboard Cite

Real-world performance of antennas is normally tested in anechoic chambers (ACs). Alternatively, experimental validation can be performed in non-anechoic environments and refined in the course of post-processing. Unfortunately, the existing methods are difficult to setup and prone to failure. In this letter, a wavelet-based framework for correction of non-anechoic antenna measurements has been proposed. The method involves automatic centering and adjusting of the wavelet w.r.t. a fraction of the signal that corresponds to line-of-sight transmission within the system under test. Performance of the method has been verified a using two compact antennas and a total of 15 experiments. Benchmarks against the state-of-the-art approaches have also been performed.

show abstract

Section: Introductionmentioning

confidence: 99%

Automatic Correction of Nonanechoic Antenna Measurements Using Complex Morlet Wavelets

Bekasiewicz,

Waladi

2024

Antennas Wirel. Propag. Lett.

View full text Add to dashboard Cite

show abstract

“…Popular methods are based on the concepts of: (i) signal decomposition and (ii) characterization of the propagation environment . The first group involves extracting the useful part of the responsepertinent to line-of-sight transmission between the reference antenna (RA) and AUT-using time-, or frequencydomain methods [9][10][11][12][13][14][15][16][17][18][19][20]. The former exploits window functions centered around the signal pulse pertinent to direct transmission [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…The latter are in the form of, e.g. complex exponentials or spherical-wave coefficients [15][16][17][18][19][20][21][22][23]. Depending on the implementation, the correction process might involve the analysis of either single-, or multi-point data [19,22].…”

Section: Introductionmentioning

confidence: 99%

“…experience-driven) setup of correction parameters or validation of performance in conditions that represent a much less demanding environment compared to standard office rooms (e.g. ACs, or semi-ACs with installed reflected surfaces) [15][16][17][18][19][20]32]. Furthermore, in the literature, the postprocessing parameters are fine-tuned to the given test conditions, which hinders transferring the setup between test sites [18,20,24].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-taper-based automatic correction of non-anechoic antenna measurements

Dzwonkowski,

Waladi,

Bekasiewicz

2023

Metrologia

View full text Add to dashboard Cite

Prototype measurements belong to the key steps in the development of antenna structures. Although accurate validation of their far-field performance can be realized in dedicated facilities, such as anechoic chambers, the high cost of their construction and maintenance might not be justified if the main goal of measurements is to support teaching or low-budget research. Instead, they can be performed in non-anechoic conditions and then refined using appropriate correction algorithms. Unfortunately, the existing post-processing methods suffer from multiple challenges that include manual setup of parameters as well as validation of performance in idealized conditions. In this communication, a multi-taper-based framework for correction of antenna characteristics obtained in non-anechoic environments has been proposed. The algorithm augments one-shot measurements of the structure under test in order to extract the line-of-sight responses while attenuating the interferences pertinent to multi-path propagation and noise from external sources of radiation. The performance of the proposed correction routine has been demonstrated in two test sites using a geometrically small Vivaldi radiator and validated against state-of-the-art techniques from the literature. The uncertainty budget for the measurements performed using the approach amounts to 0.26 dB, which is low given challenging propagation conditions considered for experiments.

show abstract

“…Antenna measurements within a reverberation chamber, semi-anechoic chamber, or even a non-ideal environment will include the effect of the multipath propagation, which will result in a distortion of the measured radiation pattern [ 15 ]. In such cases, an improvement of the measuring accuracy can be achieved through removal [ 16 , 17 ] or compensation [ 18 , 19 ] of the undesired contributions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Impact Reduction of Common Mode Currents on Antenna Feeders in Radiation Measurements

Constantin

Tamas

2020

Sensors

View full text Add to dashboard Cite

Common mode currents on antenna feeders usually occur when feeding a symmetric radiator through an asymmetric line, or when the ground plane is electrically small. Such currents may have magnitudes comparable to the feed currents and therefore have a major impact on the total radiated field. For antenna radiation measurements, both assessment and reduction of the common mode currents on antenna feeders are crucial. Techniques to discriminate antenna and feeder radiation are mainly needed for design and optimization purposes. Antenna gain measurements in a multipath site can be performed by using the distance averaging method. In this paper, we show that the distance averaging technique can be applied to reduce the effect of common mode currents for measuring the field radiated by symmetrical antennas. Two measuring configurations are proposed depending on the number of symmetry degrees of the antenna under test, and a differential approach for extracting the field created by the common mode currents was also developed. The experimental validation was performed by measuring a simple wire dipole and a log-periodic dipole array (LPDA) with a small square loop as a probe, both on the feeder side and on the feeder free side.

show abstract

Correlate measurements at different test sites

Cited by 47 publications

References 12 publications

Automatic Correction of Nonanechoic Antenna Measurements Using Complex Morlet Wavelets

Automatic Correction of Nonanechoic Antenna Measurements Using Complex Morlet Wavelets

Multi-taper-based automatic correction of non-anechoic antenna measurements

Evaluation and Impact Reduction of Common Mode Currents on Antenna Feeders in Radiation Measurements

Contact Info

Product

Resources

About