What liquid is the star in the antenna?

this substance is not a liquid, but a liquid metal gallium indium alloy.

liquid metal gallium indium alloy can be kept in liquid state at room temperature, and is used as a special material to manufacture antennas.

because of its unique physical properties, liquid metal antenna has high conductivity and plasticity, can adapt to various shapes and sizes, and can be repaired under the condition of truncation.