This “Lightsaber” Beam Is Actually a Working Radio Antenna

This “Lightsaber” Beam Is Actually a Working Radio Antenna

A plasma antenna resembling a lightsaber has transmitted radio waves and could let future spacecraft retune and redirect their antennas by adjusting a laser. Changing a radio antenna’s length can be difficult in space exploration equipment, even though that dimension helps determine which frequencies it can transmit and receive. Researchers have now demonstrated a possible [...]