Superstrate-Based Low Observable Cavity-Backed Archimedean Spiral Antenna (2-18 GHz) for Electronic Warfare Applications. - Prasad, Christy A.; Manoj, Abhina A.; Baghel, Shrikrishan; Venu, Konidala S.; Joy, Vineetha; Singh, Hema (Progress in Electromagnetics Research C, 2026)