scholarly journals Plasmon resonances management of meta-mirror for combining radar cross section (RCS) reduction and specular reflection with frequency selectivity

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ali Pesarakloo ◽  
Alireza Oruji
Keyword(s):  
Cross Section ◽  
Incident Wave ◽  
Specular Reflection ◽  
Radar Cross Section ◽  
Unit Cell ◽  
Frequency Selectivity ◽  
Polarization Conversion ◽  
Plasmon Resonances ◽  
Specific Frequency

AbstractIn this paper using Plasmon Resonances Management (PRM), a bi-functional meta-mirror is proposed in which, the meta-mirror can obtain two opposite properties in two different frequency ranges. In this method, an anisotropic unit cell with polarization conversion property is modified to have two plasmon resonances in both symmetric and anti-symmetric planes in a specific frequency. This allows the unit cell to have the property of unchanged polarization in that frequency. The meta-mirror is composed of this modified unit cell and its mirror as a chessboard arrangement and the incident wave on the meta-mirror is reflected as in-phase in that specific frequency i.e. specular reflection, while as out-of-phase in other frequencies i.e. RCS reduction. The designed meta-mirror in this paper demonstrates the RCS reduction in two side-bands from 4 to 9 GHz and 10.8 to 14.8 GHz while behaving as a specular reflection in the frequency around 10 GHz.

Broadband radar cross-section reduction using polarization conversion metasurface

2018 ◽  
Vol 10 (2) ◽  
pp. 197-206 ◽  
Author(s):  
Qi Zheng ◽  
Chenjiang Guo ◽  
Haixiong Li ◽  
Jun Ding
Keyword(s):  
Cross Section ◽  
High Efficiency ◽  
Normal Incidence ◽  
Radar Cross Section ◽  
Conversion Ratio ◽  
Polarization Conversion ◽  
Metallic Plate ◽  
Relative Bandwidth ◽  
Plasmon Resonances ◽  
The Relationship

AbstractA wideband and high-efficiency polarization conversion metasurface (PCM) is proposed and applied to reduce radar cross section (RCS). The proposed PCM unit is composed of two oblique asymmetry triangle split rings, which generate multiple plasmon resonances. Simulated and measured results demonstrate that it achieves polarization conversion over 90% from 9.24 to 17.64 GHz. Besides square checkerboard, the proposed PCM units and mirror units are arranged in triangle checkerboard. The mechanisms of both checkerboard PCMs are analyzed based on standard array theory, including the relationship between RCS reduction value and polarization conversion ratio value. The derived formulas provide a guideline to design checkerboard structure based on PCM. Simulated results demonstrate that both checkerboard PCMs achieve over 62% relative bandwidth of 10 dB RCS reduction under normal incidence with respect to the equal-sized metallic plate, which also means that the triangle one could be an alternative solution to reduce RCS. To verify the analyzed and simulated results, the fabricated sample and measured results of both checkerboard PCMs are presented. Good agreements are achieved between measurements, simulations and numerical analysis.

A Polarization Conversion Coding Metasurface for Broadband Radar Cross-Section Reduction

2020 ◽  
Vol 49 (9) ◽  
pp. 5561-5569
Author(s):  
Man Zhang ◽  
Xiaoqing Yang ◽  
Jiefang Luo ◽  
Tong Zhou ◽  
Zhe Li ◽  
...  
Keyword(s):  
Cross Section ◽  
Radar Cross Section ◽  
Polarization Conversion

scholarly journals Radar Cross Section Reduction Techniques using Metamaterials

2019 ◽  
Vol 8 (9S) ◽  
pp. 103-111
Keyword(s):  
Cross Section ◽  
Radar Cross Section ◽  
Unit Cell ◽  
Military Technology ◽  
Antenna Performance ◽  
Reduction Techniques ◽  
Stealth Technology ◽  
Research Activities ◽  
Electromagnetic Responses ◽  
Increasing Demand

In this paper, we have discussed and summarized the techniques of radar cross section reduction (RCSR). RCSR has been prompted due to the evolution of military technology. The paper reviews the basic concepts and characteristics of metamaterials, as these are the most favorable development that impacts defense industry products and stealth technology. This paper emphasizes the role of airpower and the ever-increasing demand for stealth. Initially, the blending of the fundamental aspects of stealth technology through radar signatures and methods of signature reduction are discussed. Then, the description of metamaterials and detailed analysis of their properties is made. This paper review the fundamental properties of metamaterials. It also explores the recent research activities on metamaterials in various areas. Some existing researches techniques used for RCSR are examined. The metamaterials are engineered media whose electromagnetic responses are different from those of their constituent components. The general benefits of metamaterials are pointed out in the paper. Metamaterials are mostly used in antenna configuration for enhancing antenna performance such as realizing miniaturization, expanding the operating band, enhancing gain as well as reducing RCS. These characteristics of the metamaterials are basically the reason why metamaterials should be used in stealth technology. The various categories of metamaterials used for RCSR are studied in the paper. In this paper, we have also proposed a unit cell. The unit cell consists of a square loop and intersecting strips at the edges of add shaped structure.

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