Planar Luneburg Lens Antennas for 5G and 6G Millimetre Wave Communications

In this contribution, planar Luneburg lens antennas are discussed. It is noted that the high radiation efficiency and wide scanning capabilities of planar Luneburg lens antennas make them attractive for the next generations of communication systems. We demonstrate that planar Luneburg lens antennas can scan in a 120 degrees range with negligible scan losses. Furthermore, a review of the reported planar Luneburg lenses is provided.