Radar Cross-section Measurement Techniques

Borkar, V.G.; Ghosh, Archit; Singh, Raghubir; Chourasia, N.K.

doi:10.14429/dsj.60.341

Cited by 46 publications

(29 citation statements)

References 10 publications

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“…To know the extent of damage, thermography analysis was carried out on impacted samples using IR camera (Model Thermo CAM SC 3000, Germany) supplied by M/s FLIR systems. Electromagnetic properties of composite specimens fabricated in stage-2 were evaluated using free space measurement setup (FSMS-Agilent VNA, E8364B) 11 . Sample holder is mounted between two horn lens antenna at a distance of 30 cm from the source antenna.…”

Section: Characterisationmentioning

confidence: 99%

Fabrication and Evaluation of Low Density Glass-Epoxy Composites for Microwave Absorption Applications

et al. 2017

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<p class="p1">In the present work, fabrication and evaluation of low density glass – epoxy (LDGE) composites suitable for absorbing minimum 80 per cent of incident microwave energy in 8 GHz to 12 GHz (X-band) is reported. LDGE composites having different densities were fabricated using a novel method of partially replacing conventional S-glass fabric with low density glass (LDG) layers as the reinforcement materials. Flexural strength, inter laminar shear strength and impact strength of the prepared LDGE composites were evaluated and compared with conventional High density glass-epoxy (HDGE) composites to understand the changes in these properties due to replacement of S-glass fabrics with LDG layers. To convert LDGE structures to radar absorbing structures controlled quantities of milled carbon fibers were impregnated as these conducting milled carbon fibers can act as dielectric lossy materials which could absorb the incident microwave energy by interfacial polarisation. Electromagnetic properties namely loss tangent and reflection loss of carbon fiber impregnated LDGE composites were evaluated in 8 GHz -12 GHz frequency region and compared with HDGE composites. It was observed that both LDGE and HDGE composites have shown loss tangent values more than 1.1 and minimum 80 per cent absorption of incident microwave energy. Thus the results indicates that, LDGE composites can show EM properties on par with HDGE composites. Furthermore these LDGE composite could successfully withstand the low velocity impacts (4.5 m/s) with 50 J incident energy. Due to their ability to show good mechanical properties and light weight, LDGE composites can be used as a replacement for conventional HDGE composites to realise radar absorbing structures.</p>

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Section: Characterisationmentioning

confidence: 99%

Fabrication and Evaluation of Low Density Glass-Epoxy Composites for Microwave Absorption Applications

et al. 2017

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“…• Interference (C I ) ry for successful rol of its RCS [2]. sed by the environment tion' and 'interference'.…”

Section: Interferencementioning

confidence: 99%

“…For a test case using simple targets, the RCS can be calculated analytically with a high degree of accuracy and precision [3]. The RCS of an object plays an important role in its detection by radar [2]. A thorough understanding of the electromagnetic scattering characteristics of an object is necessary for successful implementation and control of its RCS [2].…”

Section: Introductionmentioning

confidence: 99%

“…The RCS of an object plays an important role in its detection by radar [2]. A thorough understanding of the electromagnetic scattering characteristics of an object is necessary for successful implementation and control of its RCS [2].…”

Section: Introductionmentioning

confidence: 99%

“…17 (2), 253-259 (2016) invasion by animals of the sites with point targets. During a calibration activity, ground configuration and objects in the external site environment are carefully considered when improving RCS accuracy.…”

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confidence: 99%

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Interference Analysis for Synthetic Aperture Radar Calibration Sites with Triangular Trihedral Corner Reflectors

Shin¹,

Ra²

2016

International Journal of Aeronautical and Space Sciences

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The typical method for performing an absolute radiometric calibration of a Synthetic Aperture Radar (SAR) System is to analyze its response, without interference, to a target with a known Radar Cross Section (RCS). To minimize interference, an error-free calibration site for a Corner Reflector (CR) is required on a wide and flat plain or on an area without disturbance sources (such as ground objects). However, in reality, due to expense and lack of availability for long periods, it is difficult to identify such a site. An alternative solution is the use of a Triangular Trihedral Corner Reflector (TTCR) site, with a surrounding protection wall consisting of berms and a hollow. It is possible in this scenario, to create the minimum criteria for an effectively error-free site involving a conventional object-tip reflection applied to all beams. Sidelobe interference by the berm is considered to be the major disturbance factor. Total interference, including an object-tip reflection and a sidelobe interference, is analyzed experimentally with SAR images. The results provide a new guideline for the minimum criteria of TTCR site design that require, at least, the removal of all ground objects within the fifth sidelobe.

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Radar-absorbing nickel-coated fabric composite for wing-shaped structure in the X-band

Choi¹,

Kwak

Noh

et al. 2020

Composite Structures

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Radar Cross-section Measurement Techniques

Cited by 46 publications

References 10 publications

Fabrication and Evaluation of Low Density Glass-Epoxy Composites for Microwave Absorption Applications

Fabrication and Evaluation of Low Density Glass-Epoxy Composites for Microwave Absorption Applications

Interference Analysis for Synthetic Aperture Radar Calibration Sites with Triangular Trihedral Corner Reflectors

Radar-absorbing nickel-coated fabric composite for wing-shaped structure in the X-band

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