Abstract

A general method to realize arbitrary, azimuthally-invariant aperture fields using a metasurface is presented. The metasurface, consisting of cascaded inhomogeneous electric sheet impedances, is placed within a cylindrical waveguide to generate specified aperture fields through mode conversion. The surface impedance profiles of the electric sheets are found using optimization. Rapid optimization is enabled by modal network theory, and the Discrete Hankel Transform (DHT). As an example, a radially polarized Gaussian beam launcher is designed.

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