Practical Application of the Equivalent Source Method as an Antenna Diagnostics Tool [AMTA Corner]

Foged, L. J.; Scialacqua, L.; Saccardi, F.; Quijano, J. L. Araque; Vecchi, G.; Sabbadini, M.

doi:10.1109/map.2012.6348170

Cited by 35 publications

(12 citation statements)

References 10 publications

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“…By solving the discretized integral equations, equivalent current distribution on the antenna surface is obtained. The methods applied to the near-field measurement are now commercially available in INSIGHT (Microwave Vision Group) [5] and DIATOOL (TICRA) [6]. Integral equation methods enable equivalent currents reconstruction with high accuracy.…”

Section: O Ne Of the Important Parameters In Antenna Diagnosticsmentioning

confidence: 99%

Reconstruction of the Field Distribution on Slot Array Antennas Using the Gerchberg–Papoulis Algorithm

Sano

Silva

Salmerón-Ruiz

et al. 2015

IEEE Trans. Antennas Propagat.

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A method to reconstruct the field distribution on slot array antennas is presented. The field on each slot is reconstructed with high spatial resolution by extrapolating the invisible region of the plane wave spectrum (PWS) using the Gerchberg-Papoulis (G-P) algorithm. The information of the slot positions, angles, and lengths is exploited in the G-P algorithm to enhance the accuracy and resolution of the reconstructed field. The proposed algorithm is validated through the source reconstruction of a Kband radial line slot antenna (RLSA) from the near field on planar and spherical scanning surfaces.Index Terms-Gerchberg-Papoulis algorithm, near-field antenna measurements, slot array antennas, source reconstruction.

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Section: O Ne Of the Important Parameters In Antenna Diagnosticsmentioning

confidence: 99%

Reconstruction of the Field Distribution on Slot Array Antennas Using the Gerchberg–Papoulis Algorithm

Sano

Silva

Salmerón-Ruiz

et al. 2015

IEEE Trans. Antennas Propagat.

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“…In the last years, several equivalent currents-based techniques have been implemented, due to their potential for antenna diagnosis and characterization using arbitrary-geometry measurement and reconstruction domains [6], [9]. Apart from antenna diagnosis, these techniques have been proved to be efficient for removing unwanted structural interactions [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Portable Freehand System for Real-Time Antenna Diagnosis and Characterization

Álvarez-Narciandi

Laviada

Álvarez-López

et al. 2020

IEEE Trans. Antennas Propagat.

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This paper presents an agile system for antenna diagnosis. The system is operated by means of freehand movements of the probe antenna avoiding the need of bulky positioners and thus providing portability to the system. For that purpose, the probe antenna position, which is required by the antenna diagnosis algorithm, is retrieved by means of an affordable and quickly-deployable motion capture system. The probe position and the acquired field are used to characterize the antenna under test by computing an equivalent currents distribution on the antenna aperture and its far-field pattern in real-time. To achieve that, an ad hoc workflow is designed including a method for spatially balancing the acquired field samples. Although the system is not intended to provide an accuracy comparable to the one achieved by anechoic chamber facilities, it opens a new horizon of possibilities for in situ agile characterization of antennas enabling the detection of faulty elements or radiation pattern deviations. Results at Ku and Ka bands, supported by attached multimedia material, are presented to illustrate the capabilities of the system.

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“…The reconstruction of a current from its radiated field is a classical problem in electromagnetics [1], which besides being theoretically intriguing, is relevant in a number of applications. Just to quote a few of them, we mention antenna synthesis [2], [3] and/or diagnostics [4] - [6], near-field to far-field transformation [7], [8] or near-zone RCS estimation [9], [10]. Inverse source problems are also strictly linked to linearised inverse scattering problems, where similar integral operators have to be dealt with [11].…”

Section: Introductionmentioning

confidence: 99%

Near-Field Resolution in Planar Source Reconstructions

Maisto¹,

Pierri²,

Solimene³

2020

Preprint

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<div>This paper deals with the classical question of estimating the achievable resolution in terms of the configuration parameters in inverse source problems. In particular, the study focuses on the case of a planar surface magnetic current which is to be reconstructed from near-field observed over a bounded rectangular aperture parallel to the source domain. Here, the plan is to work out a resolution estimation that precisely captures the spatially varying behaviour entailed by the near-field and aspect-limited configuration. To this end, the pertinent radiation operator is inverted by an adjoint inversion scheme (a backpropagation- like method) and the corresponding point-spread function is analytically estimated. Numerical examples show that the derived resolution estimation clearly points out the role of the geometrical parameters of the configuration and it is more accurate than other literature results.</div>

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Practical Application of the Equivalent Source Method as an Antenna Diagnostics Tool [AMTA Corner]

Cited by 35 publications

References 10 publications

Reconstruction of the Field Distribution on Slot Array Antennas Using the Gerchberg–Papoulis Algorithm

Reconstruction of the Field Distribution on Slot Array Antennas Using the Gerchberg–Papoulis Algorithm

Portable Freehand System for Real-Time Antenna Diagnosis and Characterization

Near-Field Resolution in Planar Source Reconstructions

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