Context. Yebes 40 m radio telescope is the main and largest observing instrument at Yebes
Observatory and is devoted to very long baseline interferometry (VLBI) and single-dish …

We introduce and discuss a new approach to the phase retrieval (PR) of fields radiated by
continuous aperture sources having circular support, which is of interest in many …

Surface deformations of large reflector antennas highly depend on elevation angle. This
paper adopted a scheme with the ability to conduct measurement at any elevation angle …

Research on data-driven Fourier phase retrieval neural networks is well-established.
However, in many practical applications, such as phase retrieval-based antenna surface …

The surface deformation of the main reflector in a large radio telescope is closely related to
its working efficiency, which is important for some astronomical science studies. Here, we …

Microwave holographic measurement technology is a common method used in antenna
measurement. This method has high measurement efficiency and high precision. To …

Phase retrieval is to recover the object amplitude and phase from the diffraction patterns.
Here, an algebraic method is presented to solve the phase retrieval problems of arbitrary 2D …

Most reflector surface holographic measurements of a large radio telescope utilize a
geostationary satellite as the signal source. The shortcoming is that those measurements …

We present briefly the LLAMA sub-mm radiotelescope, a joint project of Argentina and
Brazil, being mounted in the Andes, Argentina, at 4800 m altitude. Here we focus on the …

The emergence of radio astronomy, space research, and satellite communication after World
War II created great activity in the design and construction of reflector antennas of increasing …