3D Printing of a Monolithic K/Ka-Band Dual-Circular Polarization Antenna-Feeding Network

In this paper, a Ka/K-band antenna-feeding network in dual-circular polarization is reported. The design of the system was carried out view its monolithic manufacturing through selective laser melting AlSi10Mg alloy. As proof-of-concept for satellite telecommunication multi-beam applications, feeding operates K band (19.25, 20.75) GHz and Ka (27.0, 29.0) GHz. provides four rectangular-waveguide ports common dual-polarized circular-waveguide port to be connected feed horn. prototype exhibits measured values in-band return loss better than 28 dB port-to-port isolation 19 (in polarization) 50 frequency). cross-polar discrimination higher 20 dB. regard, an elliptical-waveguide line specifically designed manufactured recover value 30 both frequency bands. can easily integrated horn feeding-network thanks ease customization provided by 3D printing. insertion losses are lower 0.5 0.2 bands, respectively. weight approximately 130 g.