- Satellite antennas are materials like aluminum, FRP, and steel plates. After painting the antennas with conductive

   materials, they are coated with paints  of good durability.
- Support them stably to withstand 40m/sec winds and install them in order that snow does not stick to them, so gains

   should not be lessened due to snow.
- They should have functions to access to devices by receiving electromagnetic waves from stationary satellites floating

   above the equator.