Fully Probe-Corrected Near-Field Far-Field Transformations with Unknown Probe Antennas

According to the electromagnetic uniqueness theorem, radiation behavior of an antenna under test (AUT) can be recovered from measurements two tangential components its radiated fields on enclosing surface. In practice, conducted in radiating near-field (NF) AUT utilize probe antennas finite size. Thus, instead discrete field values, spatially blurred signals are acquired. The influence compensated, however, this commonly requires precise knowledge about antenna. work, concept NF far-field (FF) transformations (NFFFTs) with full correction unknown is introduced. Two nonconvex and convex formulations presented their relation similar task phase retrieval highlighted. Simulation measurement results illustrate validity concept, shed light required complexity setups, limitations approach. Special attention paid case high practical relevance when identical.