What are multibeam lens antenna applications for global navigation satellite system anti-jam and anti-spoof capabilities?

This report researches the application of a multibeam Luneburg lens antenna to provide an anti-jam and anti-spoofing solution for Global Navigation Satellite System signals in a single aperture. In addition, the antenna can provide a direction-finding capability when paired with traditional radar techniques, such as monopulse tracking, that utilize multiple simultaneous beams to compare signal amplitudes or phases.