Multi-Frequency Phase Retrieval for Antenna Measurements

05/20/2021
by   Josef Knapp, et al.
0

Phase retrieval problems in antenna measurements arise when a reference phase cannot be provided to all measurement locations. Phase retrieval algorithms require sufficiently many independent measurement samples of the radiated fields to be successful. Larger amounts of independent data may improve the reconstruction of the phase information from magnitude-only measurements. We show how the knowledge of relative phases among the spectral components of a modulated signal at the individual measurement locations may be employed to reconstruct the relative phases between different measurement locations at all frequencies. Projection matrices map the estimated phases onto the space of fields possibly generated by equivalent antenna under test (AUT) sources at all frequencies. In this way, the phase of the reconstructed solution is not only restricted by the measurement samples at one frequency, but by the samples at allfrequencies simultaneously. The proposed method can increase the amount of independent phase information even if all probes are located in the far field of the AUT.

READ FULL TEXT

page 1

page 9

page 14

09/20/2021

Reliable Linearized Phase Retrieval for Near-Field Antenna Measurements with Truncated Measurement Surfaces

Most methods tackling the phase retrieval problem of magnitude-only ante...
05/13/2019

Synthetic aperture imaging with intensity-only data

We consider imaging the reflectivity of scatterers from intensity-only d...
02/07/2020

Phase Retrieval for Partially Coherent Observations

Phase retrieval is in general a non-convex and non-linear task and the c...
06/07/2016

Enhanced high dynamic range 3D shape measurement based on generalized phase-shifting algorithm

It is a challenge for Phase Measurement Profilometry (PMP) to measure ob...
11/12/2020

Linear Phase Retrieval for Near-Field Measurements with Locally Known Phase Relations

A linear and thus convex phase retrieval algorithm for the application i...
12/14/2016

Efficient phase retrieval based on dark fringe recognition with an ability of bypassing invalid fringes

This paper discusses the noisy phase retrieval problem: recovering a com...
02/28/2021

Dynamic Sample Complexity for Exact Sparse Recovery using Sequential Iterative Hard Thresholding

In this paper we consider the problem of exact recovery of a fixed spars...