A Ka-Band 3D Printed Horn Antenna Array

A 16×16 horn antenna array with a full-corporate air-filled waveguide feed network is investigated in Ka-band. The entire array configuration can be manufactured conveniently by adopting the direct metal laser sintering (DMLS) technology. An impedance bandwidth of 23.8% for , a gain up to 33.8 dBi with a 3-dB gain bandwidth of more than 25%, radiation efficiency of about 80%, and symmetrical broadside radiation patterns with a cross polarization level of almost less than -40 dB are achieved. The presented antenna confirms the feasibility of the millimeter-wave 3D printed high gain antenna arrays, which may find possible applications in future wireless communication systems.