▎ 摘　　要

A concern regarding electromagnetic interference(EMI) shielding materials with high absorption capacity was raisedasfifth-generation (5G) telecommunication developed. However,current shielding materials are generally focusing on reflection. Toaddress this breakthrough in EMI shielding materials, a high-density polyethylene (HDPE)/few-layer graphene compositemillimeter (mm)-scaled percolation structure was investigated forK-band electromagnetic shielding applications. The HDPE/multi-layer graphene (MLG) composite with an mm-scale percolationstructure exhibits excellent electrical and thermal conductiveproperties and shows an absorption-dominant electromagneticshielding effect. In particular, the best optimized EMI shielding effectiveness of the composite at 26 GHz was 71.25 dB and showedan excellent absorption-dominant shielding mechanism with an absorption coefficient of 0.78. The mm-scaled percolation structurerevealed that it effectively works in the K-band rather than the X-band by optimizing multiple reflection phases by the mm-scale HDPE particle