Sensitivity of the singularity expansion method applied on dipole antenna backscattering

Sarrazin, Francois; Sharaiha, Ala; Pouliguen, Philippe; Chauveau, Janic; Potier, Patrick

doi:10.1109/antem.2014.6887736

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…This level is lower than the sensitivity of the anechoic chamber (-60 dBm 2 ). The SEM is very sensitive following the antenna under study [23] but the pole extraction process is also very sensitive to the Signal to Noise Ratio (SNR) of the data [18]. The low SNR explains in part the poor stability of the damping coefficients in the UWB antenna example.…”

Section: Poles Extracted From All Directionsmentioning

confidence: 99%

Antenna Physical Poles Extracted From Measured Backscattered Fields

Sarrazin

Pouliguen

Sharaiha

et al. 2015

IEEE Trans. Antennas Propagat.

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International audienceThis paper presents a new approach to extract the physical poles of antennas. The Singularity Expansion Method (SEM) allows modelling the antenna backscattering using poles which are theoretically independent of the wave incident angle, making them useful for antenna identification. Nevertheless, only the physical poles respect this property while the spurious poles change for each incident angle. Indeed, we call physical the poles linked to the antenna itself and spurious the poles linked to anything but the antenna (excitation, noise…). The goal of this paper is to highlight the method to define the optimal time windowing applied on the antenna backscattering in order to obtain the physical poles of the antenna. The approach is based on the Window Decreasing Technique and the Window Increasing Technique. The SEM is applied on the backscattered field measured in the boresight direction of three antennas: a narrowband patch antenna, a wideband helix antenna and a UWB antenna. By using these poles to reconstruct the field backscattered in several directions, we show that the poles extracted from one direction with this new approach are relevant to reconstruct the backscattered field for any other directions. Moreover, we show that these poles can be extracted directly from these other directions

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Section: Poles Extracted From All Directionsmentioning

confidence: 99%

Antenna Physical Poles Extracted From Measured Backscattered Fields

Sarrazin

Pouliguen

Sharaiha

et al. 2015

IEEE Trans. Antennas Propagat.

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Estimation of target circumferential size by backscattered wave

Akbarpour

Chamaani

2019

IET Microwaves, Antennas & Propagation

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Most of target identification methods compare information of the backscattered field with an existing lookup table. Therefore, the identification of targets outside the table is impossible. However, by applying proper signal processing algorithms, some information about the target can be deduced. In this study, a new approach to estimate the circumferential size of radar targets, without their identification, is proposed on the base of a transient scattered field. Scattered transient response from the target consists of two parts: early time and late time. The early‐time response corresponds to direct reflection and the late time is related to oscillation phenomena corresponding to surface‐creeping waves and cavity waves. The time difference between the the start of early time and late time responses corresponds to a time interval in which creeping wave travels the geodesics surface path of the target. Therefore, by calculating the time difference between these two successive parts of response, the circumferential size of the target can be estimated. The start time of these two parts is determined by the matrix pencil method. In this study, the circumferential sizes of various simple targets such as cylinder, disc, cube, and a complex object, with an estimation error of <10% are calculated.

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Design and System Characterization of Ultra-Wideband Antennas With Multiple Band-Rejection

Rehman

Alkanhal

2017

IEEE Access

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Sensitivity of the singularity expansion method applied on dipole antenna backscattering

Cited by 4 publications

References 6 publications

Antenna Physical Poles Extracted From Measured Backscattered Fields

Antenna Physical Poles Extracted From Measured Backscattered Fields

Estimation of target circumferential size by backscattered wave

Design and System Characterization of Ultra-Wideband Antennas With Multiple Band-Rejection

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