RT Conference Proceedings
SR 00
ID 10.23919/AMTAP.2019.8906466
A1 Rodríguez Varela, Fernando
A1 Galocha Iragüen, Belen
A1 Sierra Castañer, Manuel
A1 Fernández Álvarez, Javier
A1 Mattes, Michael
A1 Breinbjerg, Olav
T1 Combination of spherical and planar scanning for phaseless near-field antenna measurements
YR 2019
FD 06/10/2019 - 11/10/2019
SP 1
OP 6
AB 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.
T2 Antenna Measurement Techniques Association Symposium (AMTA) 2019
ED San Diego, California, USA
SN 978-1-7281-4525-9
AV Published
LK https://oa.upm.es/64812/
UL https://ieeexplore.ieee.org/document/8906466