  The first low earth orbit satellite networks for internet service have
recently been deployed and are growing in size, yet will face deployment
challenges in many practical circumstances of interest. This paper explores how
a dual-band, electronically tunable smart surface can enable dynamic beam
alignment between the satellite and mobile users, make service possible in
urban canyons, and improve service in rural areas. Our design is the first of
its kind to target dual channels in the Ku radio frequency band with a novel
dual Huygens resonator design that leverages radio reciprocity to allow our
surface to simultaneously steer and modulate energy in the satellite uplink and
downlink directions, and in both reflective and transmissive modes of
operation. Our surface, Wall-E, is designed and evaluated in an electromagnetic
simulator and demonstrates 94% transmission efficiency and an 85% reflection
efficiency, with at most 6 dB power loss at steering angles over a 150-degree
field of view for both transmission and reflection. With a 75 sq cm surface,
our link budget calculations predict a 4 dB and 24 dB improvement in the SNR of
a link entering the window of a rural home in comparison to the free-space path
and brick wall penetration, respectively.
