Reliability design and simulation analysis of spaceborne Ka-band phased array antennas
Low Earth orbit satellites are of great significance in enhancing the capabilities of areas such as broadband communication,navigation and positioning,military security,and spaceborne phased array antennas are an important component of them.This article establishes a reliability model for the in orbit reliability requirements and self composition characteristics of spaceborne Ka-band phased array antennas.It also analyzes the selection and layout of antenna arrays,followed by performance simulation analysis of the spaceborne Ka phased array antennas under 10%of the units failure scenario.The simulation results show that the performance loss of the phased array receiving antenna is less than 0.5 dB under all three failure scenarios,the performance loss of the transmitting antenna is less than 1 dB,and sidelobe suppression can be improved by resetting amplitude and phase weighting values.Moreover,it still has good antenna shaping ability and can be widely used in low-cost,long-life low orbit satellite systems.