Towards low-profile transmitarrays: Multi-objective tradeoffs of inhomogeneous and anisotropic near-field transforming lenses

摘要

Transmitarray antenna performance is limited by the amplitude and phase uniformity of the illumination source. Horns are a common feed-source for transmitarrays, but require large separation distances in order to provide uniform illumination, thus, limiting the ability to realize low-profile horn-fed transmitarray systems. In order to overcome this challenge, transformation optics inspired lenses can be introduced to redistribute the horn's near field and provide uniform phase and magnitude illumination on the transmitarray within a compact space.