P2

By exploiting a collaboration with the University of Naples Federico II, LEMMA researches solved the problem of the optimal synthesis of circularly-symmetric continuous aperture sources able to radiate pencil beams fulfilling given requirements on the far-field and/or the directivity [1]. The synthesis has been conveniently reduced to a Convex programming problem, with the inherent advantages in terms of both solutions’optimality and computational burden. While avoiding super-directive solutions, the proposed approach allows one to guarantee the fulfillment of arbitrary constraints on the sidelobes and to enforce a dynamic range ratio bound on the aperture filed’s amplitude behavior.
The approach has also been applied to generate fields optimally fulfilling the “four-colors” reuse scheme recently proposed by the European Space Agency in order to realize the multi-spot beam coverage of Europe from GEO satellites [2].

1. O. M. Bucci, T. Isernia, and A. F. Morabito, “Optimal synthesis of directivity constrained pencil beams by means of circularly symmetric aperture fields,” IEEE Antennas and Wireless Propagation Letters, vol.8, pp. 1386-1389, 2009. [click here]
2. A. F. Morabito, A. R. Lagana, and L. Di Donato, “Satellite multibeam coverage of earth: Innovative solutions and optimal synthesis of aperture fields,” Progress In Electromagnetics Research,vol. 156, pp. 135-144, 2016. [click here]