Cost-effective mobile satellite communications system deployed on geostationary tracks

摘要

The present invention relates to a satellite communication system comprising one or more satellites (FIG. 3) inclined at a set angle of 0 ° or more with respect to the earth, preferably inclined at approximately 28.5 ° and placed in geostationary orbit for a global range of communication. It is about. Each satellite has a multi-element normal column antenna (RL, FL) and transmit and receive circuitry (FIG. 10) selectively connected to the multi-element normal column antenna to provide a spatially identified spot radiation beam on the earth's surface. It has a steerable space / ground antenna and transmitter-receiver circuit connected to it. At least one gateway terrestrial terminal (FIG. 2) is provided with means for performing all spacecraft commands and controls, including uplink phase adjustment of the normal column antenna, for direct satellite transmission to a given user location.