3D Printed Horn Antenna for Millimeter-Wave Focal-Plane Array Imaging Systems

A W band horn antenna for the millimeter-wave focal-plane array imaging systems is designed and fabricated by a 3D printing method. The antenna size corresponds to an array pitch of 4 mm. The antenna half-power beamwidth chosen based on the size of the quasi-optical objective is 50–70 deg, as well as the antenna gain is 8–11 dB. The experimental data confirm the simulation results and demonstrate a high quality of the antenna obtained.