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Masa-Campos, J. L., S. Sánchez-Sevilleja, C. Domínguez-Grano-de-Oro, M. Sierra-Pérez, and J. L. Fernandez-Jambrina,  "Monopulse beam-scanning planar array antenna in L band",  Microwave and Optical Technology Letters, vol. 50, no. 7, pp. 1812-1819, Jul., 2008.