New Ka-band analog predistortion linearizer allowing a 2.9GHz instantaneous wideband satellite operation

Abstract

This paper describes a new instantaneous wideband predistortion linearizer for TWTA enabling to use simultaneously broadband multi-carrier signals all over the complete 17.3–20.2GHz transmit Ka-band for the new generation of Telecom satellite. The linearizer has been embedded in a space equipment and successfully tested with a wideband Ka-band space TWTA. A state-of-the-art NPR performance was obtained over the entire 17.3–20.2GHz Ka-band with multi-carrier signals up to a 2.9GHz instantaneous bandwidth.