Near-field probe used as a diagnostic tool to locate defective elements in an array antenna

Lee, J.J.; Ferren, E.M.; Woollen, D.P.; Lee, K.M.

doi:10.1109/8.1192

Cited by 190 publications

(71 citation statements)

References 4 publications

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“…A different method has been proposed in [11] and has been compared to the BTM [10]. It has been shown that the method in [11] has better performance than BTM when the noise and the truncation error in the data can not be neglected (as happens in actual applications).…”

Section: Motivationsmentioning

confidence: 99%

“…In Section II, the distributional approach is briefly recalled and applied to the problem at hand. In Section III the proposed method is experimentally compared with the classical method in [10] for the case of a fully active phased array and then numerically tested for the case of a conformal array and spherical measurement system. Conclusions follow.…”

Section: Motivationsmentioning

confidence: 99%

“…As further comment, note the proposed method is characterized by an higher computational cost and memory requirements than BTM one [10], being based on the evaluation of a Singular Value Decomposition of the radiation operator relating the unknowns of the problem to the (measured) near-field. On the other hand, the BTM method [10] does not allow to detect faulty elements in non planar arrays.…”

Section: Testing Against Experimental and Numerical Datamentioning

confidence: 99%

“…Among the deterministic methods, a simple and fast approach to estimate the array excitations from near-field measures is the Backward Transformation Method (BTM) [10], based on a proper exploitation of the Fast Fourier Transform (FFT) algorithm. A different method has been proposed in [11] and has been compared to the BTM [10].…”

Section: Motivationsmentioning

confidence: 99%

“…The overall pattern shapes and the sidelobes level are different, and a proper investigation aimed to detect possibly faulty elements becomes mandatory. To this aim, the measured near-field data have been first processed by using the BTM method of [10]. Fig.…”

Section: Testing Against Experimental and Numerical Datamentioning

confidence: 99%

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Large Phased Arrays Diagnostic via Distributional Approach

Buonanno¹,

D’Urso²,

Cicolani³

et al. 2009

PIER

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Abstract-A deterministic method for detecting faulty elements in phased arrays is proposed and tested against experimental and numerical data. The solution approach assumes as input the amplitude and phase of the near-field distributions and allows to determine both positions and currents of radiating elements. The corresponding non linear inverse problem is properly solved by exploiting the distributional approach, which allows to cast the initial problem to the solution of a linear one, whose solution is made stable by adopting a proper regularization scheme based on the Truncated Singular Value Decomposition tool. The results fully confirm accuracy of the proposed technique. MOTIVATIONSMany applications, ranging from sonar, radar and space communications, need for fully active phased arrays [1][2][3]. These antennas have several hundreds of radiating elements or proper sub-arrays [2,3], and the possibility of their failure strongly increases. These element failures can cause sharp variations in the aperture field across the array aperture, thus increasing both the sidelobes and the ripple level of the far-field radiation pattern. In order to know which element or elements are damaged, active antennas can include calibration systems. TheseCorresponding author: M. D'Urso (mdurso@selex-si.com).

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Section: Motivationsmentioning

confidence: 99%

Section: Motivationsmentioning

confidence: 99%