Accurate scattering centers modeling for complex conducting targets based on induced currents

Xiao, Guangliang; Guo, Kun-Yi; Wu, Bi‐Yi; Sheng, Xin‐Qing

doi:10.1007/s11432-019-2746-4

Cited by 4 publications

(1 citation statement)

References 7 publications

(7 reference statements)

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“…Conventional small quadrotors are usually X-type or cross-shaped, while with the development of large quadcopters, unmanned quadcopters will conduct take-off and landing training on aircraft carriers (Chen and Shu, 2013; Zhong et al , 2019; Deepak and Singh, 2016), while some quadrotor or multi-rotor aircraft have chosen other layouts (Bian and Xiang, 2018; Zhao et al , 2013; Chen and Pérez-Arancibia, 2019). The scattering center modeling method for a X-type quadrotor is presented, then the radar imaging of the quadrotor is investigated (Xiao et al , 2020; Chen, 2018). These indicate that the electromagnetic scattering problem of quadrotors is more complex than conventional single or twin rotors, while the difference in the layout of the quadrotor will lead to their unique scattering characteristics.…”

Section: Introductionmentioning

confidence: 99%

Y-type quadrotor radar cross-section analysis

Zhou

Huang²

2022

AEAT

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Purpose The purpose of his paper is to study the radar stealth performance of a Y-type quadrotor with coaxial rotors and parallel rotors. Design/methodology/approach This Y-type quadrotor is designed as an aerodynamic layout with parallel twin rotors at the front and coaxial twin rotors at the rear. The multi-rotor scattering (MRS) method based on multi-rotor dynamic simulation (MRDS) and electromagnetic scattering module (ESM) is presented. MRDS is used to simulate the complex rotation of parallel rotors and coaxial rotors. ESM is used to calculate the instantaneous radar cross-section (RCS) of the quadrotor. Findings For a single rotor, the minimum period of the RCS curve at a given azimuth is equal to the basic passage time of the blade, where increasing the speed can shorten this minimum period. When the elevation angle increases, the forward RCS fluctuation of the quadrotor increases, while the average RCS decreases. The change of the roll angle will affect both the mean and the maximum difference of the RCS–time curve at the given lateral azimuth. The increase of the pitch angle will enhance the dynamic amplitude of the RCS–time curve under the forward azimuth. Practical implications The research in this article can provide reference for the stealth design of the Y-type quadcopter in the future. Originality/value The originality is the establishment of the MRS method. This method could provide value for dealing with the electromagnetic scattering problem of coaxial rotors and parallel rotors.

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Section: Introductionmentioning

confidence: 99%

Y-type quadrotor radar cross-section analysis

Zhou

Huang²

2022

AEAT

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A method for calculating electromagnetic scattering of complex targets using sparsely sampled current

Li,

Guo,

Liu

et al. 2024

2024 International Applied Computational Electromagnetics Society Symposium (ACES-China)

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Multistate active control RCS signature for the continuous adjustment absorber/reflector transformation applications

et al. 2021

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Smart structures with tunable electromagnetic characteristics are required for camouflaging high-value targets, such as land warfare moving equipment, in continuously changing complex electromagnetic environments. The targets must control their radar cross section (RCS) to avoid detection and tracking. Frequency selective surfaces (FSSs) are the next-generation smart structures in which active RCS control is realized via impedance loading. In this paper, a multistate transformable FSS absorber/reflector that operates in the 3.9–11.0 GHz band is introduced and analyzed. The reflectivity amplitude of this absorber/reflector could be smoothly changed from 0 to -10 dB in 6.0-8.0 GHz. Each unit cell of the FSS structure consisted of four symmetrical diamond-shaped patterns, and the adjacent units were connected by PIN diodes. The absorption intensity of the FSS could be changed from 0 to -10 dB by adjusting the PIN bias voltage, which was applied via a simple bias network. The multistate switching characteristic of the FSS was verified by simulations and measurements. The results showed that adjustable absorbing intensity and switchable working states are the desirable characteristics that allow high-value targets to adapt to changing electromagnetic environments. Our work will bridge the gap between the available stealth strategies and practical applications, such as moving stealth vehicles.

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Accurate scattering centers modeling for complex conducting targets based on induced currents

Cited by 4 publications

References 7 publications

Y-type quadrotor radar cross-section analysis

Y-type quadrotor radar cross-section analysis

A method for calculating electromagnetic scattering of complex targets using sparsely sampled current

Multistate active control RCS signature for the continuous adjustment absorber/reflector transformation applications

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