Phase-Retrieval Method Using Wire-Grid Model in Spherical Near-Field OTA Test

This paper presents a method to estimate the far-field using two spherical wire-grid models in a phase-less spherical near-field. From the simulation results for monopole, 1-patch, and 4-patch antenna, it was confirmed that the EIRP can be estimated within 1 dB at more than 100 sampling points.