Superscattering-enhanced narrow band forward scattering antenna
Hu De-Jiaoa),b),c), Zhang Zhi-Youa),b),c), Du Jing-Lei†a),b),c)
       
(a) Forward ( σ f, black dashed) and backward ( σ b, red dash–dotted) scattering cross section of the CAA with r 1 = 70 nm, r 2 = 140 nm, and r 3 = 171 nm ( t = 31 nm). Blue solid curve shows the spectrum of the corresponding cross section ratio. (b)–(f) Radiation patterns (to the far field) corresponding to these positions marked with green vertical dashed lines in panel (a). All curves are plotted with the same axis scale.