A general transformation designing high gain lens antennas with homogeneous media

By employing finite embedded coordinate transformation method, we propose a general transformation to design a highly directive horn antenna with homogeneous and anisotropic media. Different from the layered lens antenna, our antenna consists of four triangle regions made of homogeneous and anisotropic media, which greatly reduces the difficulty of practical realization. Full wave simulation based on finite element method is performed to validate the performance of the antenna.