Robust Satellite Navigation by Means of a Spherical Cap Conformal Antenna Array

This contribution presents the design and performance of a dual-band spherical cap adaptive antenna array for safety-critical satellite navigation. The array consists of seven planar elements, flush-mounted in a spherical cap holder. Each element of the array is resonant at dual frequencies with adequate bandwidth to cover the GPS L1/L5 and Galileo E1/E5a/b frequency bands. The interference mitigation and beamforming performance of the array is demonstrated by means of an adaptive beamforming algorithm. The results show a strong potential of the antenna for applications where continuous system availability is essential.