Magnetic ordering of Ga wires on Si(100) surfaces

We report on total-energy electronic-structure calculations within the density-functional theory performed for an atomic wire consisting of Ga atoms which are deposited on hydrogenated Si(100) surfaces. We find that there are three distinct stable atomic structures and that the ground state is magnetic in one of the three structures. Stability of the magnetic state against carrier doping and charge-density-wave generation is discussed

Ultra-Lightweight Deployable Antenna Membrane Technology for Future Non-terrestrial 6G Network and Earth Observation

A deployable antenna membrane is one of the promising solutions to achieve a higher speed of satellite communication and earth observation in small satellites. Unlike conventional deployable antennas, the proposed approach permits low flatness of the antenna membrane and compensates it electrically. By eliminating the conventional large deployment and support structure, the proposed non-planar membrane can be lighter and installed in small satellites. We introduce two types of membrane antennas: reflectarray antennas and active phased-array transceivers