Abstract
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 language | English |
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Title of host publication | Proceedings of 2019 Antenna Measurement Techniques Association Symposium |
Number of pages | 6 |
Publisher | IEEE |
Publication date | 2019 |
Pages | 1-6 |
ISBN (Print) | 9781728145259 |
DOIs | |
Publication status | Published - 2019 |
Event | 41st Annual Meeting and Symposium of the Antenna Measurement Techniques Association - Sheraton San Diego Hotel & Marina, San Diego, United States Duration: 6 Oct 2019 → 11 Oct 2019 Conference number: 41 |
Conference
Conference | 41st Annual Meeting and Symposium of the Antenna Measurement Techniques Association |
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Number | 41 |
Location | Sheraton San Diego Hotel & Marina |
Country/Territory | United States |
City | San Diego |
Period | 06/10/2019 → 11/10/2019 |