Ka-band Transmit Sparse Active Phased Array and Beamforming Networks for Ngso User Links (ARTES AT 5B.240)

Objectives: The objective of this activity is to design, manufacture and test a partial RF breadboard of a transmit Ka-band, active phased array antenna and associated beamforming network for user links NGSO, exploiting irregular layouts for the radiating elements and beamforming networks. The activity aims at achieving a 25% reduction in the number of active controls, a 5% increase in the DC to RF power efficiency at antenna level, and a 15% reduction in the overall mass for the entire antenna compared to a standard fully populated array. This involves developing sparse array antennas for Non-Geo-Stationary-Orbit (NGSO) satellite user links, balancing challenges related to RF aspects, accommodation, and thermal control.