Combination of Spherical and Planar Scanning for Phaseless Near-Field Antenna Measurements

Fernando Rodriguez Varela, Belen Galocha Iraguen, Manuel Sierra Castaner, Javier Fernandez Alvarez, Michael Mattes, Olav Breinbjerg

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The two scans phaseless technique is a well-known procedure for the characterization of antennas on near-field ranges without need of measuring the phase. Amplitude information over two surfaces compensates for the lack of phase reference. In this paper we propose the combination of spherical and planar surfaces for the application of the two scans technique, together with the application of Wirtinger Flow, a state-of-the art phase retrieval algorithm with high convergence guarantees. The use of different types of surface adds additional information about the field’s degrees of freedom, allowing for smaller separation between acquisition surfaces as compared with the 2-sphere techniques. In addition, an initial estimation for the phase is not required. The phase retrieval process is formulated in terms of the Spherical Wave Expansion (SWE) of the antenna under test. The SWE-to-PWE (Plane Wave Expansion) is utilized in order to process the amplitude field on the planar surface. Results for simulated and measured near-field data are shown to demonstrate the potential capabilities of the proposed technique.
Original languageEnglish
Title of host publicationProceedings of 2019 Antenna Measurement Techniques Association Symposium
Number of pages6
Publication date2019
ISBN (Print)9781728145259
Publication statusPublished - 2019
Event2019 41st​ ​Annual​ ​Meeting​ ​and​ ​Symposium​ ​of​ ​the​ ​Antenna​ ​Measurement​ ​Techniques Association - Sheraton San Diego Hotel & Marina, San Diego, United States
Duration: 6 Oct 201911 Oct 2019


Conference2019 41st​ ​Annual​ ​Meeting​ ​and​ ​Symposium​ ​of​ ​the​ ​Antenna​ ​Measurement​ ​Techniques Association
LocationSheraton San Diego Hotel & Marina
CountryUnited States
CitySan Diego
Internet address

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