Antenna design for a Direct-to-Earth link of a planetary deep space probe

This document presents an antenna design for a hot air balloon in the atmosphere of the Saturnian moon Titan in the frame of the proposed ESA/NASA Titan Saturn System Mission (TSSM). We investigate the possibility to establish a Direct-to/from-Earth (Dt/fE) link, i.e. by-passing the orbiter as central relay station for the planatary in-situ elements.