Coding Artificial Magnetic Conductor Ground and Their Application to High‐Gain, Wideband Radar Cross‐Section Reduction of a 2×2 Antenna Array

Saleem, Muhammad Rizwan; Saifullah, Yasir

doi:10.1002/pssa.202100088

Cited by 7 publications

(6 citation statements)

References 43 publications

(48 reference statements)

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“…A two-dimensional multi segment wing with hinged flaps under the spoiler is built (Liu et al, 2021;LV. et al, 2020;Li, 2019;Saleem and Saifullah, 2021;Ye et al, 2018), and the relevant aerodynamic characteristics are studied by using computational fluid dynamics method. Corner reflectors will be formed between the open drag plate and the fuselage surface, and the multiple scattering characteristics here are difficult points worth discussing.…”

Section: Introductionmentioning

confidence: 99%

Quantitative calculation of electromagnetic scattering characteristics from drag plate of aircraft afterbody

Zhou,

Huang

2023

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PurposeThis paper aims to discuss the electromagnetic scattering characteristics of the afterbody model with two drag plates.Design/methodology/approachThe plane shape of the drag plate model is designed as a rectangle. High-precision unstructured grid technology is used to treat the target surface. A calculation method based on multiple tracking and dynamic scattering module is presented to calculate the radar cross section (RCS).FindingsThe results show that under the given observation conditions, the RCS and surface scattering characteristics of a single drag plate change with the increase of the opening angle, which makes the forward RCS of the afterbody model change more than 8.43 dBm2. The opening of two resistance plates at different fixed angles has little effect on the peak value and position of the RCS of the afterbody model. The dynamic deflection of the two drag plates can bring 16.78 dBm2 fluctuations to the forward RCS of the afterbody model, and more than 25.59 dBm2 fluctuations to the side RCS.Practical implicationsThe installation positions of the drag plate on the aircraft are various, so the method in this paper can provide reference and support for RCS analysis of the speed brake at other positions.Originality/valueThe presented calculation method is of engineering value to analyze the electromagnetic scattering characteristics of the drag plate.

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Section: Introductionmentioning

confidence: 99%

Quantitative calculation of electromagnetic scattering characteristics from drag plate of aircraft afterbody

Zhou,

Huang

2023

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“…The architecture utilized the thin and nonabsorbed backscattered reducer layers. [11][12][13][14][15] Moreover, in contrast to perfect electric conductor (PEC), backscattering could be reduced by merging artificial magnetic conductors (AMCs) into a planar chessboard-like structure. Contrarily, it appears that the backscattered reduction range of these approaches' typical structures is constrained.…”

Section: Introductionmentioning

confidence: 99%

Low Reflection of Antenna with Wideband Reduced Backscattered Field Based on Phase Interference Technique

Saleem

Irfan

Atiq

et al. 2023

Physica Status Solidi (a)

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The approach of an asymmetrically designed checkerboard as a reflecting metasurface and the coding diffusive surface is proposed as a new way to minimize the antenna backscattered electromagnetic field level. At the resonant frequencies of three different metasurface units, zero degrees reflection phase is achieved. An active phase difference of 180° is maintained between three artificial magnetic conductors (AMCs) unit cells over a wide bandwidth of frequencies so that backscattered electromagnetic wave energy can be directed at different oblique angles using phase interference to reduce radar cross section. Comparatively, three AMC cells are arranged as an asymmetric chessboard along with an arbitrary phase distributed reflecting screen constructed using the random phase distribution technique. Further, compared with the reference antenna, the asymmetric chessboard has a greater reduction in backscattering. The proposed methodology is based on the backscattered field‐level cancellation and diffusion. The simulations demonstrate remarkable backscattered energy reduction from 4.9 to 18 GHz for the proposed antenna operating at 11 GHz in normal polarization (x‐ and y‐polarization). In addition, −10 dB backscattering reduction is achieved in the antenna working band (10.3–11.9 GHz), and different AMC units working at different frequencies exhibit the same radiation properties. Further, in/out‐of‐band bistatic reflected electromagnetic energy levels are significantly reduced. Similarly, the full‐wave simulation of the fabricated prototype confirms the measurement results.

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“…Polarization, one of the most basic characteristics of electromagnetic (EM) waves, refers to the oscillation direction of the electric field in the plane perpendicular to the propagation direction. [1][2][3] The polarization converter can manipulate various polarization states, which have important applications in satellite communication, [4,5] EM stealth, [6,7] antenna design, and beam steering. [8] Conventional polarization manipulation mainly uses natural materials such as twisted nematic liquid crystals by utilizing the Faraday effect.…”

Section: Introductionmentioning

confidence: 99%

A Tunable Dual‐Band Flexible Polarization Converter Based on Vanadium Dioxide Reflective Metasurface

Fu,

Zhang,

Zhang

et al. 2023

Physica Status Solidi (a)

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A flexible dual‐band efficient polarization converter is realized by both coupled mode theory (CMT) analysis and numerical simulation in the microwave regime, using a four‐layered reflective metasurface. The proposed structure can convert linearly polarized electromagnetic (EM) waves into their orthogonal components in the two sidebands and a specular reﬂection performance in the central frequency band. The polarization conversion ratio(PCR) and operating bandwidth of dual‐band can be dynamically modulated by the introduction of vanadium dioxide(VO2). Simulation results show that the proposed metasurface can achieve linear polarization conversion in 8.17‐12.87 GHz and 14.63‐18.92 GHz in the insulating phase. PCRs of the dual‐band are 97.06% and 98.13%, the corresponding relative bandwidths (RB) are 44.68% and 25.58%, respectively. In the metallic phase, the PCRs in 6.81‐13.95 GHz and 16.23‐18.16 GHz are 91.12% (RB=68.79%) and 96.92% (RB=11.22%). The analyses of the phase difference (u‐v coordinate system) and the surface current are given to explain the mechanisms of dual‐band and high PCR. The simulation results are in good agreement with those of CMT. Moreover, the structure has a robust response to the oblique incidence angle (up to 30°) and has polarization insensitivity. The proposed metasurface has great potential applications in antenna radiation, biosensing and stealth technology.This article is protected by copyright. All rights reserved.

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Coding Artificial Magnetic Conductor Ground and Their Application to High‐Gain, Wideband Radar Cross‐Section Reduction of a 2×2 Antenna Array

Cited by 7 publications

References 43 publications

Quantitative calculation of electromagnetic scattering characteristics from drag plate of aircraft afterbody

Quantitative calculation of electromagnetic scattering characteristics from drag plate of aircraft afterbody

Low Reflection of Antenna with Wideband Reduced Backscattered Field Based on Phase Interference Technique

A Tunable Dual‐Band Flexible Polarization Converter Based on Vanadium Dioxide Reflective Metasurface

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