Radome Analysis Using Equivalent Current Constructed by Near Field Transform

Accurately obtaining the field distribution inside the radome is very important for the study of radome performance. By converting the field into a current distribution, it is easy to improve the design of the radome, detect manufacturing errors, and verify numerical simulations. In this paper, analyzes the equivalent current distribution from the near-field data to its surface, i.e., the radome transformation. The transformation is based on a surface integral representation that associates the equivalent current with the near field data. The Fourier transform (FFT) and singular value decomposition (SVD) are used to analyze the current distribution of the radome surface. The results show that the method can accurately describe the field radiated by the antenna. At the same time, by determining the equivalent current on the radiator, the fault area or component can also be found, making it easy to trim the radome.