Research On Rules Of Thermal Deformation For Phased Array Antenna

According to the thermal design of the Phased Array Antenna (PAA), base on the state of thermal control technology with the PAA and the thermal-structure coupling, this paper probes into the thermal deformation of the circular plane phased array antenna. In the phased array antenna, T / R component is the main heat source. Due to the limited space of the antenna array, heat is not easy natural dissipation, which makes the antenna occur thermal deformation. However, the error caused by thermal deformation is the main factors that induces decline of antenna performance. So the study of thermal deformation of the PAA plays a crucial role in improving the performance of antenna. In order to study the thermal deformation of phased array antenna, combining with the thermal elasticity mechanics the paper deduce the thermal deformation formula of non-binding circular plane phased array antenna in the steady-state and non-uniform temperature field at first. And then combining with the factors of thermal deformation of circular-bottom PAA, the paper uses the ANSYS software to carry out a large number of simulation to the PAA under different conditions, from which getting each node deformation data in different influence factors. Data is processed and used to fit the visual map of all nodes deformation by EXCEL, according to which getting the simple formula of various factors influenced antenna array surface deformation. The paper uses numerical analysis software to fit data in different conditions. The empirical formula for calculating the array deformation of circular plane phased array antenna can be generated, accuracy of which is also verified. Finally, taking a circular plane phased array antenna as an example, the array deformation is analyzed under different conditions. The result is compared with the deformation value obtained by the empirical formula under the same conditions in order to verify the accuracy of the formula and the scope of application. The paper provides valuable guidance to improving the thermal control and thermal deformation of PAA.