Full-Wave Removal of Internal Antenna Effects and Antenna–Medium Interactions for Improved Ground-Penetrating Radar Imaging

Coster, Albéric De; Lambot, Sébastien

doi:10.1109/tgrs.2018.2852486

Cited by 28 publications

(20 citation statements)

References 40 publications

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“…In addition, differently with other Bow-tie structures, in the application of GPR system, the energy of electromagnetic wave the antenna receives is so small that the signal is difficult to be detected. So, according to [ 15 , 24 , 25 ], most of the structures of GPR antennas have been very big so far and the miniaturization of GPR antenna is still a difficulty.…”

Section: Methodsmentioning

confidence: 99%

An Improved Modified Universal Ultra-Wideband Antenna Designed for Step Frequency Continuous Wave Ground Penetrating Radar System

Shen

Yuan

et al. 2019

Sensors

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Step Frequency Continuous Wave Ground Penetrating Radar (SFCW-GPR), as a tool for nondestructive testing of shallow soil surface targets, the realization of the function of SFCW-GPR is mainly based on the theory of refraction, reflection and scattering of electromagnetic wave in the discontinuity of dielectric constant. So, the UWB antenna system, an important part of SFCW-GPR, becomes more indispensable. In this paper, an improved modified universal antenna is designed, simulated and fabricated. Based on a typical Bow-tie antenna, it is modified by the methods of lumped loads, cavity-backed loading and structure loading. The simulated and measured results show that the UWB antenna has 1.36 GHz bandwidth from 0.64 to 2.0 GHz with three resonant wavelength peaks, and having been modified and improved, the UWB antenna performances including voltage standing-wave ratio (VSWR), input impedance, the boresight gain and current distribution, are much better than the typical Bow-tie antenna. In addition, the results of verification experiment of Step Frequency Continuous Wave (SFCW) show that the antenna can be applied to the working scenarios of SFCW-GPR.

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Section: Methodsmentioning

confidence: 99%

An Improved Modified Universal Ultra-Wideband Antenna Designed for Step Frequency Continuous Wave Ground Penetrating Radar System

Shen

Yuan

et al. 2019

Sensors

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“…We assume that the material of the pavement is frequency-independent at the operating frequency of the multistatic GPR system and the coupling factors of the transmitting and receiving antennas are the same. However, for different measurement conditions, such as the surface roughness and the antenna off-plane distance, the radiation pattern is slightly different [34] [35]. Based on the above assumptions, the air wave acquired for different conditions can be equal to a ratio of the air wave which is acquired at the free space.…”

Section: B Air Wavementioning

confidence: 99%

On the Use of Lateral Wave for the Interlayer Debonding Detecting in an Asphalt Airport Pavement Using a Multistatic GPR System

Zou

Suzuki

2020

IEEE Trans. Geosci. Remote Sensing

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In this paper, we focus on the detection of the interlayer debonding of the asphalt airport pavement by the Groundpenetrating Radar (GPR) system. Since the interlayer debonding usually occurs in the shallow region of the asphalt airport pavement (several centimeters), it is difficult to interpret the anomalies or the defects from the GPR signals composed of many waves under the boundary conditions. Moreover, the wavelength of the ordinary GPR system is over several centimeters. Therefore, the spatial resolution of the system is not accurate enough to consider the millimeter thickness of the debonding layer. To overcome these problems, we propose a new method based on evaluating the lateral wave behavior of common midpoint (CMP) gathers collected by a multiple static GPR system. The multi-static GPR system is a stepped frequency continuous wave (SFCW) radar system, which consists of 8 transmitting and 8 receiving bowtie antennas. The system operates in the frequency range from 50 MHz to 1.5 GHz. After the validation of the simulation, the results of the interlayer debonding detection were evaluated by a field experiment obtained at Tokyo International Airport. The proposed method can detect the debonding layers which are less than 1mm. Also, it is shown that our proposed method has a high consistency with the conventional acoustic finding method in the field measurement. It provides an innovative and effective method for the interlayer debonding detection of a partially damaged airport asphalt pavement, which is difficult to be observed by the ordinary GPR signals.

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“…According to GPR terminology, antenna coupling is also a source of clutter [34]. Due to size limitation, we cannot avoid placing the Tx and Rx antenna in close proximity of each other; so, a part of transmitted energy is induced on Rx antenna, directly.…”

Section: B Scatteringmentioning

confidence: 99%

Clutter Removal of Near-Field UWB SAR Imaging for Pipeline Penetrating Radar

Akbarpour

Chamaani

Sachs

et al. 2020

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Recently, ultrawideband (UWB) near-field synthetic aperture radar (SAR) imaging has been proposed for pipeline penetrating radar applications thanks to its capability in providing suitable resolution and penetration depth. Because of geometrical restrictions, there are many complicated sources of clutter in the pipe. However, this issue has not been investigated yet. In this article, we investigate some well-known clutter removal algorithms using full-wave simulated data and compare their results considering image quality, signal to clutter ratio and contrast. Among candidate algorithms, two-dimensional singular spectrum analysis (2-D SSA) shows a good potential to improve the signal to clutter ratio. However, basic 2-D SSA produces some artifacts in the image. Therefore, to mitigate this issue, we propose "modified 2-D SSA." After developing the suitable clutter removal algorithm, we propose a complete algorithm chain for pipeline imaging. An UWB nearfield SAR monitoring system including an UWB M-sequence sensor and automatic positioner are implemented and the image of drilled perforations in a concrete pipe mimicking oil well structure as a case study is reconstructed to test the proposed algorithm. Compared to the literature, a comprehensive near-field SAR imaging algorithm including new clutter removal is proposed and its performance is verified by obtaining high-quality images in experimental results.

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Full-Wave Removal of Internal Antenna Effects and Antenna–Medium Interactions for Improved Ground-Penetrating Radar Imaging

Cited by 28 publications

References 40 publications

An Improved Modified Universal Ultra-Wideband Antenna Designed for Step Frequency Continuous Wave Ground Penetrating Radar System

An Improved Modified Universal Ultra-Wideband Antenna Designed for Step Frequency Continuous Wave Ground Penetrating Radar System

On the Use of Lateral Wave for the Interlayer Debonding Detecting in an Asphalt Airport Pavement Using a Multistatic GPR System

Clutter Removal of Near-Field UWB SAR Imaging for Pipeline Penetrating Radar

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