Radar tracking beam angle measurement method

The invention relates to a radar tracking beam angle measurement method, and belongs to the field of radar design. The objective of the invention is to overcome the problems of large S-curve data capacity and complex angle measurement process of an existing monopulse sum-difference beam amplitude comparison angle measurement method under the conditions of large airspace, any angle and multiple beams at the same time. The method comprises the steps of constructing a universal angle measurement curve (K curve) subjected to spatial domain transformation, the abscissa of the K curve is p, the ordinate of the K curve is the difference sum ratio (volt _ ratio), p = (sin (theta)-sin (theta B))/lambda, and storing K curve data into a radar computer; comparing the difference sum ratio (volt _ ratio) of the target echo actually measured by the radar with the K curve data, and looking up a table to obtain a corresponding p value; and calculating a target angle value according to theta = arcsin (p* lambda + sin (theta B)