scholarly journals Wideband Polarization Conversion Metasurface for RCS Reduction of Antennas

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Tao Hong ◽  
Ke Peng ◽  
Yue Gu ◽  
Wen Jiang ◽  
Shuxi Gong
Keyword(s):  
Cross Section ◽  
Fractal Structure ◽  
Radar Cross Section ◽  
Microstrip Antennas ◽  
Conversion Ratio ◽  
Polarization Conversion ◽  
Operating Band ◽  
High Polarization ◽  
Relative Bandwidth ◽  
Wide Operating

Polarization conversion metasurface (PCM) with wide operating band and high polarization conversion ratio is proposed for antenna radar cross-section (RCS) reduction. A 3rd-order quadrate fractal structure (QFS) is designed as the PCM element that the polarization conversion ratio is greater than 80% from 10.45 GHz to 32.15 GHz (relative bandwidth of 101.9%). The PCM is applied in the RCS reduction of microstrip antennas by chessboard-like arrangement on the antenna. The performances of the proposed PCM and antenna are studied by measurement and simulation. The results show that, with the radiation performance hold, the monostatic RCS of the proposed antenna is obviously reduced from 8 GHz to 28 GHz which completely covers the operating band of the antenna.

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.

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.

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 A 2-Bit Pancharatnam-Berry Coding Metasurface For Ultra-Wideband And Polarization-Insensitive RCS Reduction

2021 ◽  
Author(s):  
Baoqin Lin ◽  
Wenzhun Huang ◽  
Yong-sheng Yang ◽  
Lin-tao Lv ◽  
Jianxin Guo ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Cross Section ◽  
Ultra Wideband ◽  
Polarization Conversion ◽  
Metallic Plate ◽  
Excellent Performance ◽  
Unit Structure ◽  
Relative Bandwidth ◽  
Simulation And Experiment ◽  
Polarization Insensitive

Abstract Because Pancharatnam-Berry (PB) geometrical phase can only be generated in the co-polarized reflection coefficient under circular polarized (CP) incidence for a reflective metasurface, designing a reflective PB coding metasurface must be based on an appropriate polarization conversion metasurface (PCM), which can realize CP-maintaining reflection. In this work, to design a reflective 2-dit PB coding metasurface for radar cross section (RCS) reduction, an ultra-wideband PCM is proposed at first, the simulated results show that the PCM can realize ultra-wideband CP-maintaining reflection from 8.6 to 35.9 GHz; moreover, PB phase will be generated in its co-polarized reflection coefficient by rotating its unit structure. Thus based on the PCM, an ultra-wideband reflective 2-dit PB coding metasurface is constructed successfully. The simulation and experiment results show that the coding metasurface has excellent performance in RCS reduction under arbitrary polarized incidences, compared with a pure metallic plate with the same size, its RCS can be reduced more than 10dB in the frequency band 8.2-35.2GHz with a relative bandwidth of 124.4%.

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