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.
2005
antenna measurements; near-field methods; phaseless methods
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/132241
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