Inter-satellite terahertz communication system architecture and information transmission method thereof

The invention discloses an inter-satellite terahertz communication system architecture which comprises a transmitter and a receiver which are arranged on a satellite platform. When a terahertz frequency range is a low frequency band smaller than 10THz, the transmitter adopts a huge-amount terahertz antenna array; when the terahertz frequency range is a high frequency band of 10THz to 30THz, the transmitter is a terahertz laser; when the terahertz frequency range is the low frequency band or the high frequency band, the receiver is a huge-amount terahertz antenna array; the huge-amount terahertz antenna array comprises 104 to 107 magnitude orders of antenna array elements; the huge-amount terahertz antenna array is made by a semiconductor process, and a plurality of antenna array elements working at different wavelengths are achieved by utilizing the same process, thereby achieving a multi-frequency MIMO (Multiple Input Multiple Output) system; and after the receiver receives a terahertz wave, information is extracted by a detection quantum device, and the same detection quantum device is driven by adopting a plurality of antenna array elements. The system architecture disclosed by the invention fuses the advantages of infrared laser communication and millimeter wave communication.