This paper proposes a circularly-polarized continuous transverse stub(CTS) array antenna for space applications. The radiating structure consists of open-ended parallel plate waveguides(PPW), supporting the propagation of the transverse electromagnetic(TEM) and first transverse electric(TE1) modes. Such modes are orthogonally-polarized in the PPW cross-section and, if properly excited, can generate circular polarization(CP). The antenna radiating section consists of 32 long slots, parallel-fed by a quasi-optical system through a PPW-based corporate feed network(CFN) and an electric field rotator. The proposed antenna is matched in the 27.5-31GHz band while scanning up to +-20° in elevation, with an axial ratio(AR) below 3dB.
Circularly-polarized CTS Array Antenna for SatCom applications / Lenzini, S.; Del Mastro, M.; Vincetti, L.; Ettorre, M.. - (2021), pp. 591-592. (Intervento presentato al convegno 2020 International Symposium on Antennas and Propagation, ISAP 2020 tenutosi a jpn nel 2021) [10.23919/ISAP47053.2021.9391326].