Design and calculation of gradient honeycomb microstructure for broadband wave-transparent ceramic radome

Abstract

Abstract: To investigate wideband transparent 3D-printed Si₃N₄ antenna enclosures, this study employed Stereolithography (SLA) 3D printing technology to fabricate Si₃N₄ samples and conducted electromagnetic performance testing. Computational simulations were then utilized to evaluate the electromagnetic performance of solid structures, honeycomb structures, and gradient honeycomb structures of Si₃N₄ with varying thicknesses in the Ku(12~18 GHz) and Ka(27~40 GHz) frequency bands. The results revealed that thickness and microstructure design significantly influence the electromagnetic properties of Si₃N₄materials,and the transmittance of the honeycomb Si₃N₄ porous structure was significantly enhanced. Furthermore, by implementing a gradient design, the gradient honeycomb Si₃N₄ porous structure reduced the reflection of electromagnetic waves at the interface, achieving a gradual transition of impedance. Its transmittance exceeded 80% in the Ku(12~18 GHz) and Ka(27~40 GHz) frequency bands, with an extremely low energy loss rate (below 3%) across the entire frequency range.

Key words: 3D printing, radome, transmittance, computational simulation, honeycomb structure

CLC Number:

TB303

LIU Jie, ZHU Rong-quan, YOU Jia, WANG Xiao-ming, GUO Zhong-yuan, TANG Ye. Design and calculation of gradient honeycomb microstructure for broadband wave-transparent ceramic radome[J]. Journal of Lanzhou University of Technology, 2024, 50(5): 1-6.

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