Research On The Pattern Of 2-d Direction Finding Antenna Array Configuration In Electronic Reconnaissance

Based on the satellite antenna array as the background, using discrete element antenna array, and digital beam forming technology, this paper is intended to complete the two-dimensional direction finding task in the electronic reconnaissance. It is focused on the research, which is concerned about how to select a suitable array shapes and element layout to accommodate multi-octave signals in the receiving and processing.By theoretical analysis and computer simulation of MATLAB, this paper analyzed and compared the performance and features of the 2-D direction finding in the following classical array configuration patterns, such as uniform linear arrays, rectangular grid arrays, and uniform criss cross arrays, uniform L-shaped arrays, circular grid arrays, non-uniform linear arrays, non-uniform L-shaped arrays and concentric circular arrays.According to the limitation of the satellite platform and the possibility of project, the total element number is restricted to seven or eight or nine only. The ultimate proper array layout is circular grid arrays which have odd outer array element and feature the center element.Designed to (1+7)type circular array, the main beam in the scan is basically the same shape. Valve of side lobes, will not become higher because of wide-angle scanning. Pitching direction also has an ideal direction finding characteristic. A good two-dimensional direction finding performance is produced in the range of 2.5-6.5 GHz frequency bands; therefore it fulfilled the reception of the multi-octave signals without vagueness in the airspace.