Wideband, Very Low RCS Engineered Surface With a Wide Incident Angle Stability

Samadi, Fereshteh; Sebak, Abdel-Razik

doi:10.1109/tap.2020.3015040

Cited by 29 publications

(8 citation statements)

References 17 publications

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“…The top views of the first unit cell type (Type 1) and second unit cell type (Type 2) that share the same planar size of l p × l p (5.6 mm × 5.6 mm) but with different truncated diagonal corners are depicted in Figs. 6(a) and 6(b), respectively. Notably, Type 2 is realized by rotating Type 1 (90 • clockwise), and the overall 3-dimensional (3D) view of Type 1 is depicted in Fig.…”

Section: The Design Of Pcsmentioning

confidence: 99%

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Ultra-Wideband RCS Reduction of Circular Polarization Slot Antenna Array Based on Polarization Conversion Structures and Frequency-Selective Rasorber

Zhang¹,

Ban²,

Sim³

2021

PIER M

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This paper proposes an absorption-transmission-absorption (A-T-A) type frequencyselective rasorber (FSR) with high selectivity that is loaded above a polarization conversion structure (PCS) and applied to a circular polarization (CP) slot antenna array for ultra-wideband radar cross section (RCS) reduction. Outside the operational frequency band (out-of-band) of the antenna, the energy of the incident electromagnetic (EM) wave is directly absorbed by the FSR, whereas from within the operational frequency band (in-band) of the antenna, the incident EM wave penetrates the FSR and irradiates it on the PCS placed on the lower layer of the FSR structure, which meets the phase cancellation condition and is diffused at the same time, thereby realizing the in-band RCS reduction. Due to the lower insertion loss in the passband, higher quality factor (Q value) in the transmission band, and wider absorption band, the proposed FSR can minimize the gain loss (only 0.2 dB) of the CP slot antenna array and widen the RCS reduction bandwidth to 135.5% (5-26 GHz). In addition, due to the central symmetry of the FSR and PCS structures, the CP slot antenna array has monostatic RCS reduction performance for both horizontally polarized (HP) and vertically polarized (VP) incoming waves.

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Section: The Design Of Pcsmentioning

confidence: 99%

“…Phase cancellation [1][2][3][4][5][6] is an effective method to reduce the RCS of the antenna in the operational band. In [7], a diffuse scattering structure was proposed, which satisfies the phase cancellation condition across a wide frequency band.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Wideband RCS Reduction of Circular Polarization Slot Antenna Array Based on Polarization Conversion Structures and Frequency-Selective Rasorber

Zhang¹,

Ban²,

Sim³

2021

PIER M

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“…In recent years, metasurfaces have been applied in many fields owing to easy fabrication, low cost, thin thickness, and powerful functionality to manipulate electromagnetic waves 1–5 . Especially, metasurface has been widely reported to reduce RCS 6–9 . Excellent researchers have tried to combine radar cross section reduction (RCSR) metasurfaces with antennas.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] Especially, metasurface has been widely reported to reduce RCS. [6][7][8][9] Excellent researchers have tried to combine radar cross section reduction (RCSR) metasurfaces with antennas. It is the combination of the two that opens a new door for the design of low RCS antennas.…”

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confidence: 99%

A broadband and low‐profile magnetoelectric dipole antenna with low radar cross section

Sun

Guo

et al. 2022

Micro & Optical Tech Letters

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In this study, a novel broadband and low profile magnetoelectric dipole (MED) antenna with a low radar cross section (RCS) is proposed. The 10 dB RCS reduction is achieved by shifting the reflected energy to six directions, which is an efficient optimization method based on convolutional operations. Specifically, the polarization conversion metasurface (PCM) unit with high polarization conversion rate is constructed and employed in the MED antenna for RCS reduction. The proposed antenna is fabricated and measured.Measured results depict that the low RCS antenna offers good impedance matching in 12-15.6 GHz (relative bandwidth 26%). Compared with the reference antenna, the RCS of the proposed antenna is reduced by more than 10 dB from 9.9 to 16 GHz. It is proved that the proposed antenna has broadband and stable radiation performance and outstanding specular reflecting suppression capabilities.

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“…T o a c h i e v e wideband RCS reduction, a high gain dual-band reconfigurable Fabry-Perot cavity antenna is proposed [26]. A broadband engineered surface is proposed for low RCS and a wide oblique incident angle for complex targets with multiple bounce [27]- [28]. This method is used to detect the problem and resolve by a set of orthogonal functions.…”

mentioning

confidence: 99%

Ultra-Thin Nona-Band Polarization Insensitive Metasurface for High-Quality Sensing, EMI-Shielding, and Antenna RCS Reduction

Saxena¹,

Chintakindi²,

Ur-Rehman³

et al. 2023

Preprint

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<p>In this article, a nona-band metasurface with unit cell dimensions of 0.038λo×0.038λo×0.019λo is designed on a FR-4 substrate of 1.0mm thickness with 35µm copper cladding. In TE/TM mode, the absorbance is greater than 99% at the intended frequency bands (i.e., 5.76, 8.6, 12.68, 14.38, 17.05, 17.94, 19.20, 20.88, 22.62, and 23.62GHz), and its reflectivity is almost zero. Results indicated that the metasurface is found to extremely independent on the angles of polarization of the incident wave and the absorber is almost insensitive to the incident angle (0° – 90°) for TE/TM modes. The unit cell of metasurface is having negative permittivity, near zero permeability and negative refractive index at all intended bands which confirm exotic properties of the metasurface. The metasurface is having high quality-factor (Q = 72) at 5.76GHz frequency therefore, this metasurface is also useful for dielectric sensing application in intended bands.<a href="https://www.techrxiv.org/submit#_ftn1" target="_blank">[1]</a>The metasurface's unparalleled properties make it suitable for EMI shielding, sensing applications in the C, X, and Ku-bands, the reduction of mono-static RCS, the improvement of isolation in MIMO antennas, and the reduction of unintended noise produced by copper components used in satellite and RADAR communication.</p>

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Wideband, Very Low RCS Engineered Surface With a Wide Incident Angle Stability

Cited by 29 publications

References 17 publications

Ultra-Wideband RCS Reduction of Circular Polarization Slot Antenna Array Based on Polarization Conversion Structures and Frequency-Selective Rasorber

Ultra-Wideband RCS Reduction of Circular Polarization Slot Antenna Array Based on Polarization Conversion Structures and Frequency-Selective Rasorber

A broadband and low‐profile magnetoelectric dipole antenna with low radar cross section

Ultra-Thin Nona-Band Polarization Insensitive Metasurface for High-Quality Sensing, EMI-Shielding, and Antenna RCS Reduction

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