Broadband acoustic focusing by symmetric Airy beams with phased arrays comprised of different numbers of cavity structures

Qian Jiao¹, Liu Bo-Yang¹, Sun Hong-Xiang^{1, 2, †}, Yuan Shou-Qi^{1, ‡}, Yu Xiao-Zhu¹

(color online) (a) Transmission spectra and (b) transmitted phase delays with different numbers of cavity structure with straight channels.