I came across an article online about cell sites with a maximum of 100 meters diameter and would like to share it here. As telecommunications for places where can't cover by communication infrastructure on earth, many satellites such as Starlink from SpaceX in U.S are lunched to Low Earth Orbit[LEO]. They are operated integrally and makes his speed broadband possible. These days, the development of the new technology called "Mobile Direct" stated. It will be able to directly connect satellites to devices like smart phone without using specific antenna on earth. It will use formation flight by a large number of super small satellites as a large antenna. phased array antennas with large diameter from 25m to 100m are virtually built by the combination of over 10,000 antenna devices. If the technology is possible in the future, terrestrial network will share frequency with satellite one. We will be able to use Mobile Direct with terrestrial terminals on the same transmission speed and the number of connection as current communication network for cell phone. Personally, I think I will try to choose telecommunication companies with the cheapest communication fee in the future.