Patent ID: 6043776
Filing Date: 2000-03-28
Classification: H04B

Abstract:
A mobile satellite communication system comprising an artificial satellite, disposed in a satellite orbit, which develops an active phased array antenna so that it accomplishes a line to a terrestrial station using a portable terminal in a specific area,wherein said satellite orbit is a substantially static orbit inclined with respect to the equator and having an eccentricity;wherein said active phased array antenna includes a receive active phased array antenna and a transmit active phased array antenna;wherein said artificial satellite includes a receive artificial satellite for reception only on which said receive active phased array antenna is mounted and a transmit artificial satellite for transmission only on which said transmit active phased array antenna is mounted;wherein said receive artificial satellite and said transmit artificial satellite are docked with each other after said receive artificial satellite and said transmit artificial satellite are put in said substantially static orbit, to exhibit a transmit/receive function as one artificial satellite;wherein said receive active phased array antenna includes a first electric wave-to-optical convertor that converts a signal received by a receive device antenna into an optical signal;wherein a receive satellite body of said receive artificial satellite includes a first optical-to-electric wave convertor that converts the optical signal into an electric signal;wherein said first electric wave-to-optical convertor and said first optical-to-electric wave convertor are connected through a first optical fiber;wherein a transmit satellite body of said transmit artificial satellite includes a second electric wave-to-optical convertor that converts the electric signal into the optical signal;wherein said transmit active phased array antenna includes a second optical-to-electric wave convertor that converts the optical signal into a microwave signal and a transmit device antenna that radiates said microwave signal; andwherein said second electric wave-to-optical convertor and said second optical-to-electric wave convertor are connected through a second optical fiber.