Large Phased Array Radar Antenna Array Surface Manufacturing Technology Research

Phased array antenna is key component in phased array radar system. Usually, it is composed of many radiating arrays as well as features compact structure and high requirements for dimensional accuracy. Foreign products can be referred to during designing, while manufacturing technology must be felt after by oneself. Especially, some special technological processing required to be researched and developed independently under the condition that manufacturing is underdeveloped.This subject aims at manufacturing process of antenna array of some phased array radar, which researches on welding technology of reflector panel in antenna array and riveting technology of box in antenna array.By comparing feature of fusion welding with that of stirring friction welding, the latter is selected for reflector panel. Samples of equal ratio are made for research on welding parameters; mechanical performance, macro-structure, micro-structure, hardness, conformal performance are certified and then products are manufactured formally. After that, mechanical performance, macro-structure, micro-structure, chemical composition, crystal degree are recertified.By comparing feature of impact welding with that of hydraulic welding during riveting box of antenna array precisely, hydraulic riveting system is developed independently and is applied to actual products after analysis of finite element and re-confirmation of test sample.The research on manufacturing technology in this subject is testified to be feasible and reliable after actual processing and application to radar. Presently, stirring friction welding technology is spread to 2D water-channel welding of cold plate in phased array radar module and 3D welding of cowling on space rocket. Additionally, hydraulic riveting technology is spread to assembly of airborne phased array radar. With progressive development of research on this subject, more new processing technology will be applied to precise manufacture field of large-scale phase array radar which required continuous demonstration, introduction, mastery and spreading.