Antenna Aperture Synthesis Using Mode-Converting Metasurfaces

Mode-converting metasurfaces are passive, lossless devices that can be designed to transform a set of incident modes desired transmitted modes. In this paper, mode-converting utilized synthesize arbitrary, azimuthally-invariant TM apertures. The methods presented in work used design antennas meet specific near-field and far-field criteria unlike most which solely manipulate the far field. proposed consist coaxially-excited, radial cavity topped by metasurface. main role metasurface is establish aperture converting modal distribution excitation aperture. Its secondary impedance match coaxial feed cavity. Using network theory, an optimization-based procedure developed antennas. admittance profiles electric sheets comprise optimized profile. To illustrate procedure, Gaussian beam antenna synthesized at 10 GHz its performance verified using full wave electromagnetic solver. has height weight advantage over horn