Application of liquid crystal optical phasing technique in multi-access of satellite communication

In the process of space laser communication and networking, in order to achieve a satellite terminal for the physical beam access to a plurality of satellite terminals, thereby enabling a satellite to achieve data distribution, routing, switching and other networking functions with multiple satellites, the multi-user physical access method in the process of satellite laser communication acquisition and tracking was studied. Based on the theory of multi-beam forming ability and multi-beam forming of liquid crystal optical phased array, a new type of multi-user access method was designed. The core of this method was to realize the access to multiple terminals by using multi-beam generation and control ability of liquid crystal optical phased array. The position information of the beam in the far field and the diffraction efficiency and energy loss during the process were simulated to verify whether the scheme met the requirements of the space laser communication terminal. The simulation results show that the diffraction efficiency of the access process is greater than 80%, energy loss less than 1 dB, the results display that the proposed method is effective and feasible.