Observation of Radar Cross-Section Reduction Using Low-Pressure Plasma-Arrayed Coating Structure

Ghayekhloo, Alireza; Abdolali, Ali; Armaki, S. H. Mohseni

doi:10.1109/tap.2017.2690311

Cited by 37 publications

(21 citation statements)

References 19 publications

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“…The proposed single‐screen dual band FSS is based on a transparent substrate. Initially, the relative dielectric constant of a typical Pyrex glass material is obtained as ε r = 5.2 from a microwave interferometry test . The frequency band of interferometer device was 2 to 6 GHz.…”

Section: Design Proceduresmentioning

confidence: 99%

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Transparent dual band Wi‐Fi filter for double glazed energy saving window as a smart network

Pakdin

Ghayekhloo

Rezaei

et al. 2019

Micro & Optical Tech Letters

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A transparent advanced electromagnetic structure is designed to be used in real‐world Wi‐Fi shielding applications. Concentric square loops as frequency selective surfaces (FSSs) are analytically presented with the Pyrex glass substrate based on the equivalent electric circuit model. The designed FSS window suppresses signals at both 2.5 and 5 GHz bands, and reflects back to the indoor medium. Visible light transmittance of the studied window is achieved as 87%. Accordingly, other electromagnetic communication links can transfer through the designed filter such as cell phone, and radio. The dependency of the proposed window to polarization and angular variations is examined numerically, which shows stable frequency response at 2.5 GHz and an acceptable one for 5 GHz. As a figure of merit, the proposed structure is a double glazed window with potential application for smart, secure, and energy‐saving buildings. Also, practical considerations regarding the deployment of FSS on window glass and the separation distance between the glass layers have been investigated. A prototype of the proposed design is fabricated and measured that a good agreement between measurement and simulation is demonstrated. Therefore, parametric circuit model analysis, deployment of transparent substrate, thin metallic parts on one layer, secure indoor communications, and energy‐saving are some of the advantages of the proposed window.

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Section: Design Proceduresmentioning

confidence: 99%

“…Initially, the relative dielectric constant of a typical Pyrex glass material is obtained as ε r = 5.2 from a microwave interferometry test. 13 The frequency band of interferometer device was 2 to 6 GHz. In Figure 1, one can see the schematic procedure of retrieving the glass characteristic parameters.…”

Section: Design Proceduresmentioning

confidence: 99%

Transparent dual band Wi‐Fi filter for double glazed energy saving window as a smart network

Pakdin

Ghayekhloo

Rezaei

et al. 2019

Micro & Optical Tech Letters

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“…There have also been a number of studies on the reduction of RCS using metasurfaces with both passive loading (Li et al, ; Su, Kong, Li, Yin, et al, ; Su, Kong, Li, Yuan, et al, ; Zhang et al, ) as well as active loading (Kord et al, ; Li et al, ; Sui et al, ). In Ghayekhloo et al () the absorption of X‐band radar signals using a thin layer of collisional plasma is proposed and is analyzed as well as experimentally verified for normal or oblique incidence. Some of the RCS reduction techniques use active impedance surfaces such as a phase switched surface to reduce the RCS (Tennant & Chambers, ).…”

Section: Introductionmentioning

confidence: 99%

Active Radar Cross Section Reduction of an Object Using Microstrip Antennas

2020

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The research performed in this paper suggests that the radar cross section of an arbitrarily shaped object can be reduced by canceling the scattering from the object with the radiation from an antenna (implemented here as a microstrip antenna) placed on the surface of the object. Assuming that the direction of arrival of the incident signal is known, the radiation from the defending antenna can be adjusted in real‐time to cancel the scattering from the object in order to produce a negligible total field at the distant receiver so that the object becomes invisible to a monostatic radar working in a given known frequency band. This is implemented using an analog sensor on the object to measure the time domain field on the object, which is then connected to the antenna through an amplifier and phase shifter to control the radiation from the patch antenna. The system is implemented in real time and does not require any digitization or signal processing. The radar cross section reduction can thus be achieved with a wide variety of incident signals in the prescribed frequency band.

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“…, and fabrication one in ref. . The idea of polarization conversion metasurface with complementary elements is another aspect of scattering engineering .…”

Section: Introductionmentioning

confidence: 99%

Triangle and Aperiodic Metasurfaces for Bistatic Backscattering Engineering

Ghayekhloo

Afsahi

Orouji

et al. 2019

Physica Status Solidi (b)

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Advanced electromagnetic (EM) surfaces are commonly designed to improve wave propagation and scattering. Control of EM wave scattering is one of the important venues for metasurface as an advanced surface, in which the EM surface takes place lower space than the famous metamaterial. At the same time, advanced surfaces get the same EM features as bulk metamaterials. With a new arrangement of metasurfaces and a fully characterized solution, conspicuous bistatic backscattering reduction is achieved over a wide frequency range and incidence angle interval. Closed-form equivalent electric circuit models are primarily obtained to describe the physical challenges. Triangular and aperiodic metasurfaces are characterized to increase union diffusions of returning field. To evaluate the principal models, numeric and fabrication solutions are performed. Thus, the achieved frequency bandwidth for 10 dB reduction in bistatic backscattering is 80%. Furthermore, this fractional bandwidth goes to 70% in the case of oblique incidence. The main novelty of this research versus the related state of art is the highest 10 dB reduction bandwidth for the bistatic radar-cross-section reductions with the new studied coating configurations. Meanwhile, the obtained closed-form circuit models are suitable for other applications, such as shielding and wave path redirection.

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Observation of Radar Cross-Section Reduction Using Low-Pressure Plasma-Arrayed Coating Structure

Cited by 37 publications

References 19 publications

Transparent dual band Wi‐Fi filter for double glazed energy saving window as a smart network

Transparent dual band Wi‐Fi filter for double glazed energy saving window as a smart network

Active Radar Cross Section Reduction of an Object Using Microstrip Antennas

Triangle and Aperiodic Metasurfaces for Bistatic Backscattering Engineering

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