Far-field pattern estimation on long array antennas by 1D equivalent electric current distribution

Sugimoto, Yoshiki; Ohashi, Eriko; Arai, Hiroyuki

doi:10.1109/cama.2015.7428136

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…On the other hand, large measurement radius of the circular current distribution is better for accurately estimating the far-field in the horizontal cut plane. To accurately estimate the pattern in the horizontal plane, it is desirable to provide a distance larger than about 0.5λ between the edge in the horizontal plane of the AUT and the scan circle [25].…”

Section: Numerical Resultsmentioning

confidence: 99%

Fast Far-Field Estimation Method by Compact Single Cut Near-Field Measurements for Electrically Long Antenna Array

Sugimoto

Arai

Maruyama³

et al. 2018

IEEE Trans. Antennas Propagat.

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This article proposes a fast far-field estimation method of electrically long antenna in compact measurement space. The presented method estimates a far-field pattern on an orthogonal cut plane from the linear equivalent electric current and circular current distribution. The equivalent electric current data is measured in a reactive near-field region using a small loop probe. In the proposed method, the linear equivalent current distribution is extended by a simple numerical extrapolation formula for improving the accuracy of the estimated far-field in the broadside direction. In the horizontal plane, the far-field pattern is calculated from both the circular equivalent electric and magnetic distribution approximating equivalent magnetic current with equivalent electric current. We confirmed the validity of the proposed method from the numerical simulation and measurements results. The method allows accurate directivity measurement in a small space in about a few minutes.

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Section: Numerical Resultsmentioning

confidence: 99%