Measurement Method for Monostatic Radar Cross Section of a Scaled
                        Aircraft Model in Non-Anechoic Environment

Noh, Yeong-Hoon; Park, Chan Sun; Kim, Ki‐Jung; Jang, Youn-Hui; Yook, Jong‐Gwan

doi:10.5515/kjkiees.2019.30.7.583

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…A C-band (4-8 GHz) three times wider than the S-band (2-4 GHz) was used to analyze electrically large targets. Correspondingly, a 1 3 ⁄ scaled model was used in the analysis [16]. Fig.…”

Section: Simulation and Analysis Of Resultsmentioning

confidence: 99%

Using the CLEAN Method in Three-Dimensional Polarimetric ISAR Imaging Based on Volumetric Scattering Points

Lee,

Noh,

Yook

2024

J. Electromagn. Eng. Sci

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We developed a new technique for generating three-dimensional monostatic inverse synthetic aperture radar (ISAR) images using various types of polarimetric information on targets. To remove clutter around a target, we adopted the CLEAN method, in which only the main signals were reconstructed using an iterative algorithm. We conducted a simulation as follows: electric field data that were subjected to polarimetric scattering were obtained for the target using a full-wave electromagnetic analysis simulator. The linear polarization data of a 2 × 2 matrix were compressed into the linear to circular polarization data of a 2 × 1 matrix using the Jones vector based on circular polarization. On the grounds of the post-processed data, inverse Fourier transform was carried out to map scattering points to the spatial domain, after which the CLEAN method was used to retain only the primary scattering points.

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“…A C-band (4-8 GHz) three times wider than the S-band (2-4 GHz) was used to analyze electrically large targets. Correspondingly, a 1 3 ⁄ scaled model was used in the analysis [16]. Fig.…”

Section: Simulation and Analysis Of Resultsmentioning

confidence: 99%

Using the CLEAN Method in Three-Dimensional Polarimetric ISAR Imaging Based on Volumetric Scattering Points

Lee,

Noh,

Yook

2024

J. Electromagn. Eng. Sci

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“…To improve the accuracy of the RCS measurement, reduce the effects of interference between the antennas, and reduce the unwanted scatter of the reflected field, post-processing techniques such as time-gating, background subtraction, and coherent integration were conducted before the RCS calibration process. 45 Figure 12(c) shows the measurements of the proposed structure in terms of RCS reduction versus frequency. The line labelled “copper plate” is the RCS of the rectangular copper plate.…”

Section: Resultsmentioning

confidence: 99%

Electromagnetic-mechanical repair patch of radar-absorbing structure with electroless nickel–plated glass fabric damaged by lightning strike

Jeong

Noh

Choi

et al. 2020

Journal of Composite Materials

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This paper presents an electromagnetic-mechanical repair patch (EMRP) to restore the mechanical and electromagnetic (EM) wave absorption performance of a radar-absorbing structure (RAS) damaged by lightning strike. Several researchers have primarily focused on ensuring high repair efficiency, particularly in terms of the primary load-bearing properties of repaired fiber-reinforced plastics. However, no study has proposed a practical repair approach that considers the multi-functionality of the radar-absorbing structure. The EMRP method can be used to repair lightning strike damage in a radar-absorbing structure with electroless nickel-plated glass fabric, considering the need to maintain structural integrity and electrical continuity to achieve a high repair efficiency. Damage due to an artificial lightning strike was assessed in terms of area and depth of the damage using image processing, ultrasonic C-scan, and micro X-ray inspection. The EM characteristics of one-dimensional return loss scanning and the echo radar-cross-section level were measured to verify the stealth performance of the repaired radar absorber in the X-band. In addition, the tensile test results demonstrated that the repaired radar absorber had a high recovery rate of 93% compared to the pristine radar absorber. The experimental results obtained in this study validate the use of the proposed EMRP method in repairing radar-absorbing structures.

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“…하지만, 200×200 mm RCS 측정은 Anritsu 사의 MS4640B 벡터 네트워크 분 석기와 X-band에서 이득이 15～18 dBi인 DRH 안테나(이 득) 쌍을 사용하여 원거리장(far-field) 조건을 만족시키는 거리에서 RCS를 측정하였다 [8] . 또한 RCS 측정 중 아크릴 챔버 등 주변 클러스터의 영향을 최소화하기 위해 타임 게이팅 방법을 사용하여 플라즈마 발생기에서 반사된 신 호만 선별하여 이를 후처리함으로써 타겟의 RCS를 추출 하였다 [9] . 게 되면 전 대역에서 고루 RCS가 감소하는 것을 확인할 수 있으며, 플라즈마 주파수 ω p = Grad/s인 모의 실험 결 과와 일치하는 것을 확인하였다.…”

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Coplanar Dielectric-Barrier-Discharge(DBD) Plasma Generator for X-Band Radar Cross Section(RCS) Reduction

Cho¹,

Oh²,

Ahn³

et al. 2021

J. Korean Inst. Electromagn. Eng. Sci.

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This paper presents a dielectric-barrier-discharge (DBD) plasma generator using a coplanar method for reducing the radar cross section (RCS). Two electrodes of the plasma generator are placed in the form of a finger structure, and a 0.254 mm thick polyimide film is coated over the electrodes to act as the dielectric barrier. When a potential bias is applied, plasma is generated between the electrodes. By placing the plasma generator in front of a target, the RCS of the target is reduced by plasma generation. Fingers of widths 3 mm each were cross-arranged on 2.4 mm thick FR-4 substrates at 3 mm intervals to produce generators with a total size of 200×200 mm 2 . to experimentally verify the effects of RCS reduction at 0.3 atmospheric pressure for copper substrate targets of the same size. Thus, the monostatic RCS of a target of size 200×200 mm 2 was reduced by up to 2.6 dB in the X-band (8～12 GHz).

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Measurement Method for Monostatic Radar Cross Section of a Scaled Aircraft Model in Non-Anechoic Environment

Cited by 7 publications

References 12 publications

Using the CLEAN Method in Three-Dimensional Polarimetric ISAR Imaging Based on Volumetric Scattering Points

Using the CLEAN Method in Three-Dimensional Polarimetric ISAR Imaging Based on Volumetric Scattering Points

Electromagnetic-mechanical repair patch of radar-absorbing structure with electroless nickel–plated glass fabric damaged by lightning strike

Coplanar Dielectric-Barrier-Discharge(DBD) Plasma Generator for X-Band Radar Cross Section(RCS) Reduction

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