3-D Absorptive Frequency Selective Reflector for Antenna Radar Cross Section Reduction

Huang, Hao; Shen, Zhongxiang; Omar, Ahmed Abdelmottaleb

doi:10.1109/tap.2017.2751670

Cited by 109 publications

(52 citation statements)

References 21 publications

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“…While outside f AT , the incoming wave is absorbed with few reflection, achieving effective RCS reduction at f AB. Several designs have been presented to design band‐reflective absorbers. In Reference , a three‐dimensional (3‐D) FSA presented a wide absorption band with a reflective‐band in the middle.…”

Section: Introductionmentioning

confidence: 99%

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Wideband frequency selective absorber with high‐selective reflective‐band for RCS reduction applications

Han

2020

Micro & Optical Tech Letters

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This article presents a wideband frequency selective absorber with a high selective reflective‐band for RCS reduction application. The proposed design consists of three metallic layers. With lossy resonance of the resistors‐loaded folded loop at the front layer, wide absorption performance is obtained. Then two independently lossless resonances are employed to introducing a flexible and high selective reflective‐band with full reflectance into the absorption band. The resultant absorbers have the thickness of only ~0.076 λL at the lowest operating frequencies and exhibit a whole operating bands of 126.3%. Two absorption band with bandwidth of 60.3% and 44.5% have been achieved. A prototype of the proposed structure has been fabricated, whose measured results show reasonable agreement with the simulated responses under normal incidence.

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Section: Introductionmentioning

confidence: 99%

“… Several designs have been presented to design band‐reflective absorbers. In Reference , a three‐dimensional (3‐D) FSA presented a wide absorption band with a reflective‐band in the middle. However, due to the 3‐D structure, the absorber has a large thickness.…”

Section: Introductionmentioning

confidence: 99%

Wideband frequency selective absorber with high‐selective reflective‐band for RCS reduction applications

Han

2020

Micro & Optical Tech Letters

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“…Therefore, the patch antenna assembled with the ground plane of the BNFSA is proposed to achieve excellent low‐profile and low‐RCS performance . Meanwhile, Huang et al realize a 3‐D BNFSA by transforming the transmission resonator of the AFSS to reflection resonator, and the BNFSA is also utilized as the ground plane/reflector of a dipole antenna . Besides, in order to achieve high‐selectivity and polarization‐insensitivity band‐notched performance, BNFSA using artificial magnetic conductor (AMC) as the ground plane is proposed in References and .…”

Section: Introductionmentioning

confidence: 99%

Design of switchable band‐notched frequency selective absorber

Guo

Chen

Zheng

et al. 2019

Int J RF Microw Comput Aided Eng

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An active band‐notched frequency selective absorber (BNFSA) with switchable notch band is proposed in this article. The BNFSA is a two‐layer structure composed of a lossy layer at the top and a ground plane at the bottom, separated by an air spacer. The element of the lossy layer is a lumped‐resistor‐loaded metallic dipole with a parallel LC resonance structure, which is realized by complementary n‐shaped resonator (CnR) inserted in the center, and PIN diode is welded at two arms of CnR. The bias circuit printed on the back of the substrate of the lossy layer connects to anode and cathode of the diode by via hole and isolates by the inductor. Simulation results show that the notch bands are located at 4.50 and 6.81 GHz when the diode sets to ON and OFF, respectively. To validate the performance of switchable BNFSA, the prototypes are fabricated and measured, reasonable agreement between simulated and measured results is obtained.

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“…Nowadays, reducing the visibility of radar targets in a wide frequency band for any incoming radar frequency is one of the challenging objectives for military applications and a topic of interest for researchers. This wideband RCS reduction (RCSR), that is, reducing the electromagnetic (EM) backscattered waves from a surface, is essential in stealth technology and one of the beneficial parameters in designing antennas . Different techniques were proposed in the literature for RCSR, which are generally classified into two groups, that is, active and passive cancelation.…”

Section: Introductionmentioning

confidence: 99%

“…In passive cancelation, the RCS is reduced through the destructive interference between the scattered waves from different parts of the radar target . There are several methods for passive cancelation, that is, object coating, shaping, using radar absorbent material (RAM), and surfaces such as electromagnetic band gap (EBG), frequency selective surfaces (FSS), AMCs, and meta‐material absorbers …”

Section: Introductionmentioning

confidence: 99%

Wideband radar cross section reduction using a novel design of artificial magnetic conductor structure with a triple-layer chessboard configuration

Zaker

Sadeghzadeh

2018

Int J RF Microw Comput Aided Eng

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A novel wideband three‐layer chessboard‐like structure is proposed to reduce the radar cross section (RCS) of the radar target. This configuration is composed of two artificial magnetic conductor (AMC) cells formed by two crossed ellipses with different sizes in two cells. A desired 180° ± 37° phase difference is achieved by combining these unit cells and the measured 10 dB RCS‐reduction bandwidth is extensively broadened to more than 96% (from 8.11 to 23.32 GHz, covering X, Ku, and K bands for different radars) in comparison with the other works. This characteristic is obtained by carefully adjusting the positions of all resonances using the proper sizes for the ellipses and the proper dielectric constants and thicknesses for the three layers. Although, the proposed design has three layers with the overall thickness of 2 mm, it is still thinner than most of the recent related works. This low‐profile structure is also cost‐effective due to the fact that 60% of the overall thickness is formed by an air substrate. The proposed cells are designed, simulated, and fabricated in a chessboard‐like configuration for both monostatic and bistatic RCSs. Simulations and measurements are in a good agreement, which shows the capabilities of the design.

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3-D Absorptive Frequency Selective Reflector for Antenna Radar Cross Section Reduction

Cited by 109 publications

References 21 publications

Wideband frequency selective absorber with high‐selective reflective‐band for RCS reduction applications

Wideband frequency selective absorber with high‐selective reflective‐band for RCS reduction applications

Design of switchable band‐notched frequency selective absorber

Wideband radar cross section reduction using a novel design of artificial magnetic conductor structure with a triple-layer chessboard configuration

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