Low-cost discrete dielectric terahertz lens antenna using 3D printing

A discrete dielectric lens antenna is studied in this paper as a possible low-loss, low-cost solution for high-gain terahertz operation. Dielectric columns with a variable height are used as the lens elements for phase compensation. A matching layer at the air-dielectric interface is added to reduce the reflection and to enhance the lens antenna directivity. A low-cost three-dimensional (3D) printing technology is utilized to fabricate the proposed lens antenna. Both simulated and measured results are presented for a prototype working in terahertz region. This study shows that the proposed low-cost design methodology is well suited for high-gain THz antennas.