A time domain spherical near-field measurement facility for UWB antennas employing a hardware gating technique

Blech, Marcel D.; Leibfritz, M.M.; Hellinger, Raphael; Geier, Daniel; Maier, F.; Pietsch, A.; Eibert, Thomas F.

doi:10.5194/ars-8-243-2010

Cited by 4 publications

(5 citation statements)

References 24 publications

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“…which has been derived by taking into account that the TD field is bandlimited to ω max . In (16), Δt = π/ χ t ω max , with χ t being the time oversampling factor, t i = iΔt, 2ℓ is the number of the nearest considered TD samples, i 0 = Int t m, n ′ /Δt…”

Section: Td Osi Algorithmmentioning

confidence: 99%

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TD optimal sampling interpolation over a plane from NF data collected through a non‐conventional plane‐rectangular scanning

D’Agostino

Ferrara

Gennarelli

et al. 2017

IET Microwaves, Antennas & Propagation

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A time domain (TD) optimal sampling interpolation (OSI) scheme to efficiently reconstruct the transient field radiated by an ultra‐wide band (UWB) antenna over a plane in the near‐field (NF) region from a minimum number of its NF TD samples, acquired through a non‐conventional plane‐rectangular scanning, is developed in this study. Such a result has been achieved by properly exploiting the non‐redundant sampling representations of electromagnetic fields and modelling the antenna by a proper rotational surface. Since the UWB antennas are usually quasi‐planar, such a surface can be conveniently chosen coincident with that of an oblate ellipsoid or with that formed by two bowls with the same circular aperture and possibly different lateral bends. Numerical examples, which assess the accuracy of the related TD OSI representations, are reported.

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Section: Td Osi Algorithmmentioning

confidence: 99%

“…It is useful to note that TD gating techniques can be profitably exploited to remove multiple reflections from the measured TD NF data, thus enabling the use of a non-perfectly anechoic chamber [16].…”

Section: Introductionmentioning

confidence: 99%

TD optimal sampling interpolation over a plane from NF data collected through a non‐conventional plane‐rectangular scanning

D’Agostino

Ferrara

Gennarelli

et al. 2017

IET Microwaves, Antennas & Propagation

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show abstract

“…It is worth noting that, when characterising an AUT from TD NF measurements, time-domain gating techniques can be usefully adopted to filter out the multiple reflections affecting the measured NF data, thus allowing one to perform the NF measurements also in a non-perfectly anechoic environment [6].…”

Section: Introductionmentioning

confidence: 99%

Optimal sampling interpolation over a plane from transient bi‐polar near‐field data

D’Agostino

Ferrara

Gennarelli

et al. 2016

IET Microwaves, Antennas & Propagation

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The non-redundant sampling representations of electromagnetic fields are properly applied in this study to develop an optimal sampling interpolation formula over a plane in the time domain (TD) from a minimum number of bi-polar near-field data. To this end, the ultra wide band antennas typically employed for communication applications and modern radars and characterised by a quasi-planar geometry are modelled as enclosed either in an oblate ellipsoid or in a flexible surface formed by two circular bowls with the same aperture diameter, but with eventually different lateral bends. In both the cases, numerical examples, assessing the effectiveness of the TD interpolation schemes, are shown

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“…anechoic chamber and by time-gating the measured data, one can filter out multiple reflections occurring during the measurement [9] [10]. This allows the data accuracy enhancement especially for low frequency measurement in small anechoic chambers for which the absorption quality is unsatisfactory.…”

Section: Introductionmentioning

confidence: 99%

Transient UWB Antenna Near-Field and Far-Field Assessment From Time Domain Planar Near-Field Characterization: Simulation and Measurement Investigations

Serhir

2015

IEEE Trans. Antennas Propagat.

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In this paper we present the experimental validation of Time-Domain (TD) Near-Field to Near-Field (NFNF) and Near-Field to Far-Field (NFFF) transformations for UWB antenna transient characterization. The used computation schemes for near-field to near-or far-field transformations are based on the Green's function representation of the radiated field where NF and FF are directly calculated in the time domain. The first step of the validation process comprises the electromagnetic simulation results dedicated to evaluate the accuracy of NFFF and NFNF transformations. The second step uses near-field measurement data of a Vivaldi antenna to validate the developed computation schemes whereas the measurement and calibration procedures are fully described. The measured NF data using Supelec planar and cylindrical near-field facilities are also compared with the electromagnetic simulation transient results of the Vivaldi antenna.

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A time domain spherical near-field measurement facility for UWB antennas employing a hardware gating technique

Cited by 4 publications

References 24 publications

TD optimal sampling interpolation over a plane from NF data collected through a non‐conventional plane‐rectangular scanning

TD optimal sampling interpolation over a plane from NF data collected through a non‐conventional plane‐rectangular scanning

Optimal sampling interpolation over a plane from transient bi‐polar near‐field data

Transient UWB Antenna Near-Field and Far-Field Assessment From Time Domain Planar Near-Field Characterization: Simulation and Measurement Investigations

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