The invention relates to a method for testing an RCS (
radar cross section) of a low-scattering
conformal antenna based on two-dimensional
microwave imaging, which is characterized by comprising the following steps: carrying out an RCS test on a
metal envelope and a low-scattering
conformal antenna in an installed state so as to obtain a two-dimensional
microwave image; carrying out two-dimensional
Fourier transform on the obtained new two-dimensional
microwave image so as to obtain the data of a target
spectral domain; carrying out an RCS test on a
metal ball (the RCS of the
metal ball is known) so as to obtain a two-dimensional microwave image, then carrying out two-dimensional
Fourier transform on the obtained two-dimensional microwave image so as to obtain the data G0 (f, theta) of a scattered field of the metal ball, wherein the data of the scattered field varies with frequency and angle; and finally, obtaining the RCS of the
conformal antenna, wherein the RCS of the conformal antenna meets the following formula: RCS= G1 (f, theta) (of the conformal antenna) - G0 (f, theta) (of the metal ball) + RCS (of the metal ball). The method provided by the invention is a method for testing an RCS (
radar cross section) of a low-scattering conformal antenna in an installed state based on the two-dimensional
microwave imaging technology, and after practicing, the obtained effect is good, therefore, the method provided by the invention has great
engineering popularization value.