Wideband Radar Cross Section Reduction Using Artificial Magnetic Conductor Checkerboard Surface

Mol, Vadakkekalathil Abdul Hakim Libi; Aanandan, C. K.

doi:10.2528/pierm18030303

Cited by 18 publications

(6 citation statements)

References 26 publications

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“…The 10 dB RCS reduction occurred when the phase difference ϕ between these two reflected orthogonally polarized waves reaches180 • ± 38 • [14]. As shown in Fig.…”

Section: Design and Analysis Of Checkboard-amc Surfacementioning

confidence: 84%

“…These two resonances mostly achieved by two separate designs of MS cells which result in a major drawback, such structures are significantly increase the complexity of the overall system. Two different designs of AMCs cells arranged in chessboard proposed to decrease both monostatic and also bistatic radar cross-section [14]. In [15] an integration of the AMC with the antenna array, the RCS reduction is applied in mm-wave antenna array to reduce the reflections towards moving vehicle by cancelling out the wave backscattered by the antenna array.…”

Section: Introductionmentioning

confidence: 99%

“…Unlike the conventional isotropic AMC, the Polarizationdependent AMC (PD-AMC) features an asymmetrical build and reflects the polarized plane waves differently according to the polarization of incident wave. Subsequently, several PD-AMC structures have been introduced, including the modified Jerusalem cross and the fractal design [14], [15], [16], [17], [18]. The simple technique of RCS reduction is based on polarization-dependent AMC unit in a chessboard configuration for wave cancellation.…”

Section: Introductionmentioning

confidence: 99%

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Broadband Low RCS Based on Polarization-Dependent Artificial Magnetic Conductor Metasurface

et al. 2023

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The reduction of radar cross-section (RCS) becomes an essential requirement for many military and civilian applications. One of the ways to achieve this is by using artificial magnetic conductors (AMCs) as electromagnetic surfaces. In this research, the reduction of the RCS is realized by adding a novel single layer AMC based metasurface unit cells that depend on polarization to cancel backscattering for Ka applications. The proposed AMC unit cell consists of a rectangular patch with open ended microstrip stubs. This unit cell exhibits a wide band phase difference about 180 • ± 38 • between the two reflected orthogonal field components in the frequency range from 27 to 56.5 GHz (about 71% relative bandwidth). Four AMC block arrays perpendicular to each other are combined in a chessboard configuration. To validate the capability of achieving a good RCS reduction, a substrate integrated wave guide (SIW) cavity-backed slot antenna is placed in the center of the AMC sheet. Simulation results show that the proposed AMC unit cell significantly reduces backscattered energy from 29.5 GHz to 50 GHz and from 28.5 GHz to 48.5 GHz in both y− and x−polarization, respectively, and covers a −10 dBbackscattering reduction at antenna working band (32.2 − 34 GHz). The antenna's bistatic performance at different frequencies is also presented. The fabricated design's measurements and simulations match well, verifying and validating the proposed design.

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“…The 10 dB RCS reduction occurred when the phase difference ϕ between these two reflected orthogonally polarized waves reaches180 • ± 38 • [14]. As shown in Fig.…”

Section: Design and Analysis Of Checkboard-amc Surfacementioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Broadband Low RCS Based on Polarization-Dependent Artificial Magnetic Conductor Metasurface

et al. 2023

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“…Since PMCs do not exist naturally, artificial magnetic conductor (AMC) surfaces and electromagnetic band-gap (EBG) structures are designed and created to emulate PMCs [11]; these surfaces have very high impedance over a specified frequency range, effectively acting as a PMC or bandstop filter over that range. Some recent examples of antennas utilizing AMCs and EBG structures are given in [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A TE-mode Rectangular Microstrip Patch Antenna Excited by Coplanar L-strip Feed

Adams¹,

Pour²

2023

PIER C

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This paper proposes a coplanar L-strip feeding technique to excite the dominant transverse electric (TE) mode in a rectangular microstrip patch antenna. To excite the dominant TE 10 mode, the patch and ground layers are composed of artificial magnetic conductor (AMC) unit cells, and the L-strip is fashioned so that it is coplanar with the AMC patch layer. Two TE-mode microstrip patch antennas are full-wave analyzed and fabricated, one in which the AMC patch is centered with respect to the ground plane and one in which the AMC patch is shifted laterally with respect to the ground plane to improve radiation pattern symmetry. Measured results from the fabricated antennas are discussed and compared to the simulations. The proposed antennas successfully excite the dominant TE 10 mode while having at least 11% impedance bandwidth, 8 dBi gain, and stable broadside radiation patterns.

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“… by another AMC cell, a chessboard‐like configuration formed by combining two AMC cells was proposed in Refs. , which has a significant increased operating bandwidth. In fact, whether a combination of two AMC cells or a combination of PEC cell and AMC cell, the subarray unit of the chessboard‐like configuration having a binary value of 1 or 0, between which a 180° phase difference is obtained.…”

Section: Introductionmentioning

confidence: 99%

Design of phase matching chessboard‐like electromagnetic metasurfaces for wideband radar cross section reduction

Chen

Shen

et al. 2019

Micro & Optical Tech Letters

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In this article, a chessboard‐like electromagnetic metasurfaces which can realize the polarization compensation and cancellation of the reflection beam in microwave region is designed and realized for wideband radar cross section (RCS) reduction. The chessboard‐like electromagnetic metasurfaces are composed of a square annular artificial magnetic conductor (AMC) combination with the Jerusalem cross AMC. Simulation and experimental results demonstrate that the chessboard‐like electromagnetic metasurfaces exhibit significantly RCS reduction over −10 dB in the frequency bandwidths 6.16‐18 GHz, and two RCS reduction peaks at 7.0 and 12.0 GHz in the considering frequency ranges for the normal incidence of an electromagnetic wave. The physical mechanisms of the RCS reduction peaks can be elucidated by the phase matching technology similar to the impedance matching technology applied to radar absorbing materials (RAMs). The basic physical property implies that RCS reduction based on the composite AMC metasurfaces can be improved greatly by introducing as many phase matching points as possible in the functional frequency bands. Considered that the phase matching is a necessary condition rather than a sufficient condition for RCS reduction of the chessboard‐like AMCs structures, other physical mechanisms of RCS reduction are also discussed by far field distribution, near field distribution and the properties of mono‐static RCS reduction.

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Wideband Radar Cross Section Reduction Using Artificial Magnetic Conductor Checkerboard Surface

Cited by 18 publications

References 26 publications

Broadband Low RCS Based on Polarization-Dependent Artificial Magnetic Conductor Metasurface

Broadband Low RCS Based on Polarization-Dependent Artificial Magnetic Conductor Metasurface

A TE-mode Rectangular Microstrip Patch Antenna Excited by Coplanar L-strip Feed

Design of phase matching chessboard‐like electromagnetic metasurfaces for wideband radar cross section reduction

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