Through-The-Wall Detection With Gated FMCW Signals Using Optimized Patch-Like and Vivaldi Antennas

Fioranelli, Francesco; Salous, Sana; Ndip, Ivan; Raimundo, Xavier

doi:10.1109/tap.2015.2389793

Cited by 51 publications

(31 citation statements)

References 26 publications

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“…Table Ш lists out the comparison between the proposed antenna and other published related antennas. From Table Ш, the proposed TSERC structure Vivaldi antenna is smaller in dimensions than the conventional Vivaldi antennas as reported in [11][12][13][14][15]. In addition, the comparative results show the improvement in directivity of the proposed antenna at 1GHz and 2GHz.…”

Section: B Radiation Patternsmentioning

confidence: 68%

A Novel Miniaturized Vivaldi Antenna Using Tapered Slot Edge With Resonant Cavity Structure for Ultrawideband Applications

Liu

Zhou

Yang

et al. 2016

Antennas Wirel. Propag. Lett.

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Section: B Radiation Patternsmentioning

confidence: 68%

A Novel Miniaturized Vivaldi Antenna Using Tapered Slot Edge With Resonant Cavity Structure for Ultrawideband Applications

Liu

Zhou

Yang

et al. 2016

Antennas Wirel. Propag. Lett.

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“…We can see that the gain of the designed antenna increases as the frequency gets higher and it varies between 5.1 dB and 10.1 dB across the desired 0.5 to 2.5 GHz bandwidth. Compared with the UWB antennas for similar applications in [23], higher values of gain are provided in this paper (5-10 dB versus 2-7 dB).…”

Section: Low-frequency Uwb Miniaturized Vivaldi Antennamentioning

confidence: 90%

“…The Vivaldi antenna is a kind of UWB tapered slot antenna. It has the advantages of wide bandwidth, symmetrical pattern, stable gain, simple structure, low profile, and easy integration [23,24]. Generally speaking, the size of antenna is determined by its working wavelength, and the wavelength λ can be obtained from the relationship (λ = c/ f ) between the wave velocity c and frequency f in free space.…”

Section: Low-frequency Uwb Miniaturized Vivaldi Antennamentioning

confidence: 99%

“…According to the needs of some specific applications, such as a portable MIMO antenna array for TWR imaging in this paper, we plan to use the UWB Vivaldi antenna with low frequency characteristics, so it is necessary to study the miniaturization of Vivaldi antenna. Through a series of studies and discussions [23][24][25][26][34][35][36], it can be concluded that most antenna sizes are reduced but many aspects of performance will be affected, such as narrowing of the working frequency band and decreasing of gain. As a result, the research on antenna miniaturization is to ensure that the performance of the antenna is minimally changed.…”

Section: Low-frequency Uwb Miniaturized Vivaldi Antennamentioning

confidence: 99%

“…UWB signals are suitable for the radar system while the through-wall penetration losses for general wall materials increase with frequency. On the other hand, lower working frequency band for antennas can provide better through-wall penetration but this also implies a larger size of the antenna [23]. Hence, the antenna working frequency range of 0.5-2.5 GHz is considered to balance good resolution and strong penetration even for thick walls.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and Analysis of a UWB MIMO Radar System with Miniaturized Vivaldi Antenna for Through-Wall Imaging

Zeng

Wang

et al. 2019

Remote Sensing

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The ultra-wideband (UWB) multi-input multi-output (MIMO) radar technique is playing a more and more important role in the application of through-wall detection because of its high resolution, lower antenna requirements, and efficient data capturing ability. This paper develops a novel UWB MIMO radar system using a stepped-frequency continuous-wave (SFCW) signal, which is designed to detect human targets behind the regular brick and concrete wall. In order to balance high range resolution and wall-penetration depth, a novel miniaturized Vivaldi antenna with desired bandwidth of 0.5–2.5 GHz was designed, simulated, manufactured, and successfully used in through-wall imaging. To suppress the artifacts in the focused image and reduce the computing complexity, the cross-correlation-based time domain back projection (CC-TDBP) algorithm was developed. In addition, a through-wall imaging model was established, based on which the effects of the wall on the refraction of electromagnetic (EM) waves and the reduction of velocity are compensated. Finally, different experiments were conducted for multiple stationary targets utilizing the designed radar system, and the improved BP-based algorithms are applied to focus the targets behind the wall more accurately. The reconstructed two-dimensional (2D) images illustrate that the designed MIMO radar system can successfully detect and image human targets in the air and behind the wall.

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Reflection and transmission of microwaves in reinforced concrete specimens irradiated by modified antipodal Vivaldi antenna

Esmati

Moosazadeh

2018

Micro & Optical Tech Letters

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In this letter the reflection and transmission properties of reinforced concrete specimens irradiated by a modified, high-gain, ultra-wideband antipodal Vivaldi antenna (MAVA) are investigated numerically and experimentally. First, the influence of the interfaces between free space and concrete, and a reinforced bar (rebar) cell embedded in concrete on the reflection property is investigated at frequency range from 0.65-3.5 GHz. Second, the transmission property of the reinforced concrete specimens is investigated at 2.45 GHz using a small resonant microstrip patch antenna embedded in concrete at the location of a rebar cell with different values of cell parameter. It is shown that the reflection from the free space-concrete interface of specimens with and without rebars provides the most critical effect on the reflection and transmission properties of the specimens. It is also shown that maximum transmission can be achieved when the patch antenna is located in the centre of the rebar cell. The measured results are in good agreement with the numerical results. The results of this letter can be used for nondestructive testing of reinforced concrete specimens and for wireless power transmission to sensors embedded in reinforced concrete.

show abstract

Through-The-Wall Detection With Gated FMCW Signals Using Optimized Patch-Like and Vivaldi Antennas

Cited by 51 publications

References 26 publications

A Novel Miniaturized Vivaldi Antenna Using Tapered Slot Edge With Resonant Cavity Structure for Ultrawideband Applications

A Novel Miniaturized Vivaldi Antenna Using Tapered Slot Edge With Resonant Cavity Structure for Ultrawideband Applications

Design and Analysis of a UWB MIMO Radar System with Miniaturized Vivaldi Antenna for Through-Wall Imaging

Reflection and transmission of microwaves in reinforced concrete specimens irradiated by modified antipodal Vivaldi antenna

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