volume | PIER Journals

Abstract

This article presents a novel numerical approach to reduce scattering echoes in the front region of dielectric objects with the method of auxiliary sources. The method involves using a Gaussian radio pulse covering the 6-12 GHz frequency range. The approach involves optimizing the dimensions and dielectric permittivity of an elliptical cylinder in order to make it invisible, thus eliminating the need for metamaterial cloaking. The proposed approach has been validated by comparing the results of numerical experiments obtained during pulse echo observations with the FDTD and MoM numerical methods. The proposed method is a highly efficient and practical approach for scattering problems, such as scattering echo reduction, offering comparable results to FDTD and MoM methods with significantly reduced computational requirements.

1. Murugesan, Akila, Krishnasamy Selvan, Ashwin K. Iyer, Kumar Vaibhav Srivastava, and Arokiaswami Alphones, "A review of metasurface-assisted RCS reduction techniques," Progress In Electromagnetics Research B, Vol. 94, 75-103, 2021.

2. Alitalo, P. and S. Tretyakov, "Electromagnetic cloaking with metamaterials," Materials Today, Vol. 12, No. 3, 22-29, 2009.

3. Bondeson, A., Y. Yang, and P. Weinerfelt, "Optimization of radar cross section by a gradient method," IEEE Transactions on Magnetics, Vol. 40, No. 2, 1260-1263, Mar. 2004.

4. Du, F., P. Huang, and J. Ji, "Study and optimization on the scattering characteristic of two-dimensional metal airfoil covered with plasma using ADE-FDTD," Optik, Vol. 147, 224-231, 2017.

5. Liao, Wen-Jiao, Yuan-Chang Hou, and Szu-Ti Chen, "Dielectric-loaded ultrawideband RCS reduction structures," IEEE Transactions on Antennas and Propagation, Vol. 68, No. 3, 2277-2289, 2020.

6. Chen, Shin-Hon, Yuan-Chang Hou, and Wen-Jiao Liao, "Multistep cylindrical structure design for wideband radar cross section reduction at normal incidence," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 4, 1849-1853, Apr. 2015.

7. Cai, Wenshan, Uday K. Chettiar, Alexander V. Kildishev, and Vladimir M. Shalaev, "Optical cloaking with metamaterials," Nature Photonics, Vol. 1, 224-227, 2007.

8. Younesiraad, H., M. Bemani, and S. Nikmehr, "Scattering suppression and cloak for electrically large objects using cylindrical metasurface based on monolayer and multilayer mantle cloak approach," IET Microwaves, Antennas & Propagation, Vol. 13, No. 3, 278-285, 2019.

9. Song, Yi-Chuan, Jun Ding, Chen-Jiang Guo, Yu-Hui Ren, and Jia-Kai Zhang, "Ultra-broadband backscatter radar cross section reduction based on polarization-insensitive metasurface," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 329-331, 2015.

10. Tabatadze, Vasil, Kamil Karaçuha, and Revaz Zaridze, "Electromagnetic Diffraction by a Pulse from 2-D Dielectric Objects," 2022 IEEE 2nd Ukrainian Microwave Week (UkrMW), 559-562, Ukraine, 2022.

11. Tabatadze, V., O. Drobakhin, and K. Karaçuha, "Pulse diffraction by a circular dielectric cylinder," Journal of Electrical Engineering, Vol. 74, No. 3, 188-196, 2023.

12. https://www.youtube.com/channel/UCc-HE2OgIpftQPo96haA6Hw.

Mr. Emre İşcan

Dr. Vasil Tabatadze