부산대학교 도서관

This work presents the design of a metasurface-based Bessel beam launcher in Ka-band. The launcher uses a modulated metasurface to generate the non-diffractive beam in its near-field. The key advantage of the proposed structure is the large non-diffractive range. The radial size of launcher rises up to $9.95\lambda$, while the axicon angle decreases to $\theta_{\alpha}=5^{o}$ to achieve the high non-diffractive range. Full-wave numerical results validate the operation of the systems.