A novel hybrid procedure is proposed in this paperfor far-field reconstruction from phaseless near-field data. A basicallyinterferometric approach is adopted to retrieve the near-fieldphase from amplitude-only measurements, which are collected bya simple microstrip circuit used in conjunction with two identicalprobes moving on the scanning surface. A certain number of setsof complex near-field data is obtained, apart from constant phaseshiftsto be computed, one for each set. A nonredundant representationbased on the introduction of the reduced field is thenadopted to evaluate these shifts, with an accurate and fast convergenceto the solution. In order to validate the proposed technique,an X-band prototype using two flanged WR-90 waveguides is successfullydesigned and tested on a cylindrical geometry for a standardpyramidal horn.
A novel hybrid approach for far-field characterization from near-field amplitude-only measurements on arbitrary scanning surfaces
COSTANZO, Sandra;DI MASSA, Giuseppe;
2005-01-01
Abstract
A novel hybrid procedure is proposed in this paperfor far-field reconstruction from phaseless near-field data. A basicallyinterferometric approach is adopted to retrieve the near-fieldphase from amplitude-only measurements, which are collected bya simple microstrip circuit used in conjunction with two identicalprobes moving on the scanning surface. A certain number of setsof complex near-field data is obtained, apart from constant phaseshiftsto be computed, one for each set. A nonredundant representationbased on the introduction of the reduced field is thenadopted to evaluate these shifts, with an accurate and fast convergenceto the solution. In order to validate the proposed technique,an X-band prototype using two flanged WR-90 waveguides is successfullydesigned and tested on a cylindrical geometry for a standardpyramidal horn.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
