Interferometry Between Rotated Antenna Arrays

Paper in proceeding, 2026

In this contribution, the performance of a low-frequency radio telescope, based on phased aperture subarrays commonly called stations, is discussed at the interferometer-level. To this end, the instrumental Stokes leakage and the intrinsic cross polarization ratio are calculated. The performance of one radio interferometer baseline, consisting of two stations with the same antenna distribution but each rigidly rotated with a different orientation with respect to the cardinal directions, is investigated. These station rotations are intended to minimize the synthesized sidelobes of the stations when they are combined to form an interferometric beam. Full-wave simulations for a Square Kilometre Array (SKA) prototype station have been used for this study.