Electromechanical and Thermal Synthesis Analysis of Spaceborne Active Phased Array Antenna

The general design principles and requirements of large-scale satellite antennas include indicators of mechanical, electrical, thermal, environmental and reliability. With the development of satellite technology, space-borne antennas are gradually developing towards light weight, large aperture, high frequency band and high accuracy, which makes the traditional electromechanical and thermal separation analysis design idea no longer applicable. Based on this, this paper takes a large space-borne active phased array antenna as the breakthrough point, in which a comprehensive analysis of its electromechanical and thermal properties is carried out. Firstly, the whole satellite system model of satellite antenna is established according to the given parameters, and the modal analysis is carried out. Then, the variation of temperature field during the satellite entering and leaving the shadow area of the earth and the corresponding deformation of the antenna are analyzed. Finally, HFSS is used to simulate the electrical performance of the whole satellite system and a comparative analysis is made with or without thermal deformation. The results show that when the whole satellite system enters and leaves the shadow area of the earth, the temperature changes very sharply, the thermal deformation of the antenna array is very large and causes a very large drop in the electrical performance of the antenna.