Edge-On Backscattering Augmentation Design of Thin Conducting Plate Based on Dielectric Resonator

SHANG Yuping; FENG Guisheng; LIAO Cheng

doi:10.11999/JEIT221479

Volume 46 Issue 1

Jan. 2024

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SHANG Yuping, FENG Guisheng, LIAO Cheng. Edge-On Backscattering Augmentation Design of Thin Conducting Plate Based on Dielectric Resonator[J]. Journal of Electronics & Information Technology, 2024, 46(1): 353-361. doi: 10.11999/JEIT221479

Citation:

SHANG Yuping, FENG Guisheng, LIAO Cheng. Edge-On Backscattering Augmentation Design of Thin Conducting Plate Based on Dielectric Resonator[J]. Journal of Electronics & Information Technology, 2024, 46(1): 353-361. doi: 10.11999/JEIT221479

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Edge-On Backscattering Augmentation Design of Thin Conducting Plate Based on Dielectric Resonator

doi: 10.11999/JEIT221479

Institute of Electromagnetic Field and Microwave Technology, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

Funds: The National Natural Science Foundation of China (61601379, 61771407)

Received Date: 2022-11-25
Rev Recd Date: 2023-04-12

Available Online: 2023-04-19

Publish Date: 2024-01-17

Abstract

Abstract

The quasi-superdirective reradiation based on the magnetic dipole resonance occurring within a passive dielectric resonator is presented to augment the backscattering cross-section of thin conducting plates at edge-on incidence. It is demonstrated that a hybrid electromagnetic resonance mode reradiating like a magnetic dipole can be induced within a properly dimensioned cuboid dielectric under the illumination of a plane electromagnetic wave. Using this cuboid dielectric as a basic unit cell, a supercell consisting of two identical dielectrics closely cascaded along the propagation direction of the impinging wave is formed. It is observed that both the magnetic and electric fields induced within the two dielectrics of the supercell exhibit opposite senses along with almost equal magnitudes. Because of the internal field distribution with opposite phases and almost equal magnitudes, the supercell acts as a two-element quasi-superdirective magnetic dipole array and the resultant quasi-superdirective reradiation effectively contributes to the backscattering cross-section enhancement. Further, the supercells with halved profile are loaded onto the surfaces of thin conducting plates according to the image theory. The results indicate that the magnetic-dipole-based quasi-superdirective reradiation assisted by dielectric resonators with a profile of only 0.078λ₀ noticeably modifies the edge-on scattering characteristic of thin conducting plates. Effective augmentation of backscattering cross-section for edge-on incidence is therefore achieved within relatively wide band and angular ranges.
- Radar cross-section enhancement,
- Dielectric resonator,
- Hybrid electromagnetic resonance mode,
- Superdirective reradiation

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References(25)

References

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