Low‐Loss Graded Dielectrics via Active Mixing of Nanocomposite Inks during 3D Printing

Additive manufacturing has emerged as a promising approach for fabricating graded refractive index structures that control the electromagnetic response of radio frequency (RF) devices. However, current 3D printing methods cannot produce continuous gradients from multiple materials. Here, low-loss dielectrics via active mixing nanocomposite inks composed block copolymers and oxide nanoparticles are designed printed. By simultaneously tailoring their rheological, printing, local filler particle-to-polymer ratio using an printhead, conductive microstrip-graded substrate matching network with gradually changing dielectric response, is created. In these printed devices, impedance RF signal controlled by rather than varying microstrip geometry, enabling fabrication smaller This enables rapid design high-performance devices locally tunable properties.