A two-dimensional (2-D) discrete dielectric lens antenna is designed to radiate Prickly Pear fan-shaped multi-beam patterns for gain stability in beam switching.The target is to minimize adjacent-beam overlapping transition regions and provide sufficient and similar gains for all field angles when the antenna is employed in a mobile device.This design starts with a conventional 2-D Luneburg lens antenna, and distorts its dielectric permittivity and the sizes of discrete dielectric rings to defocus the pencil beam patterns into shaped ones with a relatively flat pattern for uniform field distribution.
The design is realistically implemented at 38 GHz with both simulation and measurement results shown Bike Parts - Pedals - Parts to validate the concept.Successful validation of feasibility in beam synthesis is achieved.Fabrication discrepancy to result in slight radiation degradation is also discussed.