Research On Adaptive Beam Steering Technology Of Airborne Phased Array Rada

The airborne phased array radar is relatively advanced in the radar field at present.Compared with the old mechanical scanning radar,the airborne phased array radar is not only more flexible in scanning,but also has a larger scanning range and higher scanning efficiency.It plays a significant role in both military and civil fields.The airborne active phased array radar is derived from the fixed phased array radar.Compared with the fixed phased array radar,the airborne phased array radar can be carried on aircraft.The airborne phased array radar can scan the areas where the aircraft can reach conditionally and its scanning range is larger,the scanning freedom is higher,and the application scenarios are wider.But compared with ordinary fixed phased array radar,the beam control of airborne phased array radar is more complex and difficult.The airborne active phased array radar is fixed on the aircraft,and the position and attitude of the aircraft will change constantly during flight,so the pointing angle must be adjusted and changed constantly according to the status of the aircraft.This beam control mode is adjusted in real-time according to the aircraft and is called adaptive beam control.The main research content of this project is adaptive beam control technology of airborne phased array radar.This technology is the product of optimization based on programmable devices and is a very common and efficient device in the field of phased array radar design.Compared with traditional computing devices,FPGA technology can perform parallel computing with faster computing speed.FPGA can be customized according to user needs with higher degrees of freedom.Moreover,its internal structure can be re-edited according to changes in needs,which can effectively reduce development costs.To achieve the above objectives,this paper designs two main steps.The first step is to obtain the aircraft’s position and attitude information through the aircraft’s navigation equipment and calculate the relative positions of the target point and the radar in the radar coordinate system by a series of conversion calculations.Then we obtain the direction angle of the radar beam.The second step is to calculate the phase of each element unit.Finally,by controlling the phase of each antenna unit,the airborne active phased array radar can accurately point to the target point that the user needs to monitor.