A Fast Antenna Pattern Reconstruction Method Based on Spherical Wave Decomposition and Phaseless Measurement in a Reverberation Chamber

According to the theory of spherical wave expansion (SWE), the power correlation coefficients between two antennas can be derived solely by the SWE coefficients of the antennas in a well-stirred reverberation chamber. It has been verified that the power autocorrelation coefficients (PACCs) obtained by rotating the antenna at different angles can invert the SWE coefficients, allowing for the reconstruction of the antenna’s radiation pattern. The reconstruction accuracy of the pattern is proportional to the number of SWE modes of the antenna. As the modes number increases, the antenna pattern reconstruction method based on phaseless test needs to increase the numbers of rotation angles, which will increase the testing overhead. To solve this problem, this paper proposes a fast phaseless test method to reconstruct the antenna pattern. The PACCs of a specific angle is screened by an iterative method, which effectively reduces the overall testing time.