K_a-band implementation of a geodesic half Maxwell fisheye lens antenna

In this work, a half Maxwell fisheye geodesic lens is proposed. This lens is used to produce a beam-scanning antenna operating at Ka-band, suitable for 5G/6G and satellite communications. The proposed antenna has a wide beam coverage of 90° from -45° to 45° with scan loss below 3 dB, and a maximum gain of 24.3 dBi at 30 GHz. The size of this lens antenna is almost half that of a conventional Luneburg-Rinehart lens antenna.