Dbf-based Radar Active Phased Array Antenna

DBF has been increasingly used in the device of radar systerms. This thesis presents a combination of distributed active planar array and DBF to meet the various requirements of radar counter measure tests. It analyses the composition and engineering realization methods of the radar array antenna. By way of amplitude and phase tapering across the array elements, The array can achieve a low emissive and receiving sidelobes. The array also makes use of sidelobe cancel and sidelobe blanking to countermine the jammings come from sidelobes. DBF can be used to realize multiple various beams flexibly. Adaptive DBF algorithms ensure radar the ability of jamming cancellation and pattern null-steering. The engineering realization circuit of DBF which is based on FPGA can perform parallel multi-channel digital beamforming with a high speed. Finally, This paper also gives the simulation results of antenna pattern and DBF.This thesis devised a radar array antenna platform which adapt to different working mode. It can perform a flexible emissive and receiving antenna beam and have a good anti-jamming ability. This thesis is a previous research before engineering fulfillment.