Design and calculation of gradient honeycomb microstructure for broadband wave-transparent ceramic radome
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 per-formance of solid structures,honeycomb structures,and gradient honeycomb structures of Si3N4 with var-ying 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 Si3N4 materi-als,and the transmittance of the honeycomb Si3N4 porous structure was significantly enhanced.Further-more,by implementing a gradient design,the gradient honeycomb Si3N4 porous structure reduced the re-flection of electromagnetic waves at the interface,achieving a gradual transition of impedance.Its trans-mittance 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.
3D printingradometransmittancecomputational simulationhoneycomb structure
万方数据
维普
