Bradley Duncan1 Maxwell Plaut1 Benjamin Barclay1 John Russo1 Theodore Fedynyshyn1 Sebastien Uzel2 Robert Weeks2 Jennifer Lewis2

1, Massachusetts Institute of Technology, Lexington, Massachusetts, United States
2, Harvard Universitry, Cambridge, Massachusetts, United States

3D-printing of composites offers advantages over single component systems for developing and producing radio frequency (RF) devices by synergistically combining the properties of the matrix and filler components. To date, there has been limited success in printing composite structures with suitable electromagnetic characteristics for operation in the millimeter-wave range (>30 GHz). Here, we describe a generalized block copolymer based strategy to incorporate ceramic and conductive materials into 3D-printable inks. The behavior of these inks can be tuned by altering the filler particle to polymer ratio in a plug-and-play fashion and can be deposited with both positional and compositional control using a custom active mixing printing nozzle. The performance of RF devices for operation in the Ka band (26.5 - 40 GHz) printed using this technology will be discussed.