Method for determining flatness of flat plate slotted antenna array face

The invention discloses a method for determing the planeness of a planar slot antenna array surface, mainly aiming at resolving the problem that the prior method does not take the interferences of the deformation error and the manufacturing error on the planeness of the array surface in actual operating conditions into consideration. Based on the antenna structural mechanics analysis and a functional relation expression between the deformation error and the manufacturing error of the planeness of the constructed array surface and a directional diagram of a far field of an electromagnetic field, the method of the invention analyzes the inference of the deformation error of the planeness of the array surface caused by the structural stress on the electrical property, and simultaneously analyzes the interference of the manufacturing error of the planeness of the array surface caused by the structural stress on the electrical property; depending on the analytic interferences of errors on the electrical property, the ratios of the deformation error and the manufacturing error are reasonably assigned by an optimized process, so as to realize the relatively accurate determination of the planeness of the planar slot antenna array surface. The method can be used for directing the processing, manufacturing and structural design of the planeness of the planar slot antenna array surface, thereby improving the whole performance of the planar slot antenna.