3D printing technology for RF and THz antennas

Additive manufacturing (AM), or often called 3D printing is an emerging research area which has received much attention recently. It allows 3D objects with arbitrary geometry to be printed automatically layer by layer. 3D printing technology offers several advantages compared to conventional manufacturing techniques such as capability of more flexible design, prototyping time and cost reduction, less human interaction and faster product development cycle. This paper reviews state-of-the-art 3D printed antennas from microwave to THz frequencies and offers practical and futuristic perspectives on the potentials and challenges of 3D printed antennas.