Layered Gradient Cylindrical Lens with Axial Symmetry

The solution of the problem of synthesis of a layered lens with axial symmetry in the form of a set of parallel dielectric disks with a gradient of number of refraction along the radius is obtained. The dielectric disks are located between metal disks. The layered lens transforms the spherical wave front of the source into a flat one. As an example of using the obtained solution a design and analysis of a layered lens antenna, the layers of which are made in the form of a set of concentric dielectric rings is fulfilled. A pyramidal horn radiator is used as a feed element. The analysis of the lens antenna was carried out by numerical simulation using the finite element method.