Performance evaluation of conducting polymer paints as radar absorbing materials (RAM)

Biscaro, R. S.; Nohara, Evandro Luís; Peixoto, G.G.; Faez, Roselena; Rezende, Mirabel Cerqueira

doi:10.1109/imoc.2003.1244885

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…Considering the nondestructive testing applications, we choose foam bricks, a widely used building material, as MUT. The approximate NRL arch method [8] is adopted to obtain the reduced reflectance. Figure 2a displays that the reflectance is reduced mostly to 10% from 1.0 GHz to 1.48 GHz with an RBW of 39%, compared to the reflectance of 35% of the bare wet MUT under the normal incidence.…”

Section: Experimental Validationmentioning

confidence: 99%

Experimental Validation of Enhanced GPR Signals by A Broadband Metasurface

Zheng,

Hao

2023

J. Phys.: Conf. Ser.

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In this paper, the potential of a broadband metasurface for ground penetrating radar (GPR) signal enhancement is investigated by simulation and experiments. Simulation results show that the reflection at the air-MUT interface can be reduced from 35% to 5% over a broad frequency range (relative bandwidth up to 44%) when the broadband metasurface is in place. Measured reflectance is consistent with the simulation results. Meanwhile, the electric field strength measurement results demonstrate that the transmitted electromagnetic signals can be amplified when the reflection is reduced over the same frequency range. GPR experiments verified that clear hyperbolic signals emerged for commonly undetectable pipes when the high-frequency signals are enhanced. The proposed broadband metasurface can be an effective solution for the detection of nonmetallic inclusions in high-lossy media.

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Section: Experimental Validationmentioning

confidence: 99%

Experimental Validation of Enhanced GPR Signals by A Broadband Metasurface

Zheng,

Hao

2023

J. Phys.: Conf. Ser.

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“…As a copper plate on the back is used to block the transmission of EM waves, we just needed to measure the reflectivity. We adopted the NRL (Naval Research Laboratory) arch reflectivity testing method [ 38 , 39 ] to measure the reflectivity of the prototype in free space. The vector networker analyzer (Agilent N5230A, Agilent Technologies, Santa Clara, CA, USA) was connected to the transmitting and receiving antennas which were mirrored on both sides of the incident normal line.…”

Section: Structure Simulated and Experimental Setupmentioning

confidence: 99%

Polarization-Controlled and Flexible Single-/Penta-Band Metamaterial Absorber

Wang

Yang

et al. 2018

Materials

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In this paper, a polarization-controlled and flexible metamaterial absorber made of a set of wires etched on ultrathin teflon dielectric substrate is proposed. The simulation results showed that the proposed absorber achieved single-band absorptivity of 99.8% at 6.64 GHz for the TM (transverse magnetic) polarization wave and penta-band absorptivity of more than 99% at 11.68 GHz, 13.58 GHz, 15.48 GHz, 17.38 GHz, and 19.28 GHz for the TE (transverse electric) polarization waves. Moreover, each absorption peak had very narrow relative bandwidth and the position of penta-band absorption peaks could be adjusted by changing the length of the corresponding wire or selecting suitable substrate material according to actual requirements, because each wire can independently respond to electromagnetic (EM) waves. Furthermore, the surface current distributions corresponding to each absorption peak were studied to demonstrate the absorption mechanism. The absorption properties of the proposed structure with different bending radii and under different incident angles of the EM waves were investigated, showing good flexibility and incident angle-insensitive properties. In addition, the simulation results were confirmed by measuring a fabricated prototype. The proposed absorber may have useful applications in polarizers, sensors, bolometers, polarization detectors, etc.

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“…Absorbing materials can convert the energy of electromagnetic waves projected onto their surfaces into heat or other forms of energy through dielectric loss [ 12 ]. The use of absorbing materials to establish a microwave absorption environment has been widely applied in military and civilian fields [ 13 , 14 ]. In the context of SAR antenna vacuum thermal tests, the United States, Japan, Italy, and others have utilized Eccosorb SF absorbing materials for building microwave absorption environments [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Method for Microwave Absorption and External Thermal Flow Simulation in SAR Antenna Vacuum Thermal Tests

Pan,

Zhang,

Liu

et al. 2024

Sensors

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The simulation of microwave absorption and external thermal flow is an essential aspect of the vacuum thermal testing process for Synthetic Aperture Radar (SAR) antenna. This paper proposes a novel integrated method for simulating microwave absorption and external thermal flow, specifically designed for vacuum thermal testing. The method employs a non-woven fabric square pyramid assembly as the primary structure to establish a low electromagnetic scattering environment. External heat flow simulation is achieved by arranging carbon fiber heating wires between square cones. Through numerical analysis and experimental tests, the influence of the position of the carbon fiber heating wire on the uniformity of heat flow and reflectivity was revealed. A prototype system is developed based on these findings. The external thermal flow is adjustable in the range of 80–550 W/m2, with a uniformity better than 5%. The reflectivity in the L to X microwave frequency band is basically better than −25 dB, and in local frequency bands, it is better than −30 dB. The system has been successfully applied in SAR antenna component and satellite vacuum thermal tests, meeting all ground simulation test requirements and exhibiting significant potential for widespread application.

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Performance evaluation of conducting polymer paints as radar absorbing materials (RAM)

Cited by 6 publications

References 11 publications

Experimental Validation of Enhanced GPR Signals by A Broadband Metasurface

Experimental Validation of Enhanced GPR Signals by A Broadband Metasurface

Polarization-Controlled and Flexible Single-/Penta-Band Metamaterial Absorber

An Integrated Method for Microwave Absorption and External Thermal Flow Simulation in SAR Antenna Vacuum Thermal Tests

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