The Macro Basis Functions (MBFs) approach is a form of domain-decomposition method
applied to radiation and scattering problems solved by using integral-equation techniques. It …

Phased arrays have a long history in radio astronomy. Large, sparse synthesis arrays have
been in use for decades to capture high-resolution images of deep space objects. More …

In this paper we present the electromagnetic modeling and beam pattern measurements of a
16-elements ultra wideband sparse random test array for the low frequency instrument of the …

Accurate modelling of the primary beam is an important but difficult task in radio astronomy.
For high dynamic range problems such as 21 cm intensity mapping, small modelling errors …

Integrated structural-electromagnetic (EM) optimization design is of great importance in the
area of antenna design. The quick and exact calculation of patterns for distorted reflectors is …

Modern interferometric imaging relies on advanced calibration that incorporates direction-
dependent effects. Their increasing number of antennas (eg in LOFAR, VLA, MeerKAT/SKA) …

Measuring the redshifted sky-averaged neutral hydrogen 21 cm signal with a wide-band
antenna operating at metre wavelengths can probe the thermal history of the Universe and …

The effects of the antenna far-field power pattern limits the imaging performance of modern
wide-bandwidth, high-sensitivity interferometric radio telescopes. Given a model for the …

This paper describes a data-driven method to model the radiation patterns (over a large
angular region) and scattering parameters of antennas as a function of the geometry of the …

This dissertation presents modal-based techniques for the effective systematic design of
quadruple-ridged flared horns (QRFHs) as reflector feeds for radio astronomy applications …