Simplified OTA Test Using Phase-less Spherical Near Field

This paper presents a far field estimation method for a small low-gain antenna using a phase-less spherical near field to reduce the measurement facility size and measurement time used in the far field measurement. The proposed method is phase-less near field measurement by introducing three novel techniques such as the method of forming approximated wire grid model of the antenna, optimal matrix calculation, and near field measurement. We obtained high accuracy far field estimation by introducing the proposed method, which is verified in simulation.