Single-Frequency Multipath Diagnosis in an Anechoic Chamber of a Hybrid Far-Field Antenna Measurement System

In this communication, we present an antenna radiation measurement calibration method based on a multipath diagnosis in an anechoic chamber of a hybrid near- and far-field antenna measurement system. With the near-field (NF) scan functionality of the method, one may be able to discriminate multipath signals using the measured data at various positions at a single frequency. In this technique, a virtual array of receiving (RX) probes by their grid of locations is created to collect the data for further processing by a matrix pencil method (MPM) for determining the characteristics of multipath signals. Then, a reference antenna is employed to produce a calibration matrix factor (CMF) that can be stored in a file and be directly incorporated with the measurement of the radiation of any antenna under test (AUT) to derive its corrected radiation patterns without the need for further calibration by a multifrequency scan. The simulation and measurement examples are presented to demonstrate the feasibility and utilization of this calibration methodology.