Design of a Dual-Band Dual-Polarized Choke-Ring Horn Antenna for TT&C Applications in Ka-Band

The design of a dual-band dual-polarized chokering horn antenna for Low Earth Orbit (LEO) Telemetry, Tracking and Control (TT&C) satellite applications in Ka-band is reported here. The antenna comprises an input circular waveguide as the primary feed where two topologies are explored with quad- and hexa-ridged cross-sections. The optimization has been performed using commercially available software. The obtained simulation results of the latter solution indicate a significant improvement on the RF performance. A preliminary design of the proposed dual-band dual-polarized excitation network is also presented and discussed. The detailed design of the complete antenna is on-going in the frame of an ESA funded activity and preliminary results will be presented during the conference.