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3.1.1.2 electronically steerable antennas

Electronically Steerable Antennas (ESAs) could offer a great aerodynamic "marginal gain." Traditional satellite connectivity relies on bulky, mechanical dishes housed under large radomes that create significant parasitic drag. In contrast, ESAs are flat-panel or conformal, allowing them to sit flush against the fuselage. This low-profile design can reduce an antenna's drag penalty significantly, directly lowering fuel consumption and CO2 emissions. Furthermore, ESAs eliminate heavy mechanical gimbals and motors, reducing the aircraft's overall mass. Beyond physical benefits, their ability to maintain high-bandwidth links with multiple satellite orbits enables real-time flight path optimization. This allows pilots to adjust trajectories dynamically to avoid wind resistance or contrail-forming atmospheric layers. By refining both the aircraft's "clean" profile and its operational intelligence, ESAs provide an immediate, retrofittable path toward more sustainable flight.