Single-Cut Phaseless Near-Field Measurements Using Two Probes

Abstract

Single-cut phaseless measurements enable the testing of antenna devices with no reference channel by measuring and transforming to far-field individual pattern cuts. This typically requires performing two single-cut measurements at different distances which may be infeasible or too time-consuming in some antenna facilities. As an alternative, this communication proposes the use of a two-probe system connected to the same coherent receiver. The relative phase between probes is exploited to retrieve the absolute phase using a state-of-the-art linearized phase retrieval approach. Simulations and measurements are performed to validate the technique which includes an innovative probe-to-probe calibration method