A General Method for Designing a Radome to Enhance the Scanning Angle of a Phased Array Antenna

Abstract

Abstract-We propose a general method to design an arbitrarily shaped radome which can extend the scanning angle of a phased array antenna through finite embedded transformation (FET). The main advantage of our method is that the relationship between the incident angle and steered output angle of the radome can be designed in advance (e.g., a linear relation can be achieved). Unlike a traditional FET, which is often applied onto a slab region, we first apply FET onto an arbitrarily shaped region to bestow the desired radome with an arbitrary shape. Two specific examples have been given to demonstrate our method. Numerical simulations show good performance of our radome.

Transformation Optics: From Classic Theory and Applications to its New Branches

“…the relation between the input angle and the output angle of the radome can be analytically designed). [186,187] A similar idea can also be extended to other physical fields. For a DC magnetic field, a DC magnetic hose is similar to ONM.…”

“…Besides the power combination, ONMs have also been applied to extend the scanning angle of a phased array antenna in a predesigned manner (i.e. the relation between the input angle and the output angle of the radome can be analytically designed) . A similar idea can also be extended to other physical fields.…”

Transformation-Optics-Based Design of a Metamaterial Radome for Extending the Scanning Angle of a Phased-Array Antenna

“…Moreover, it relies on negative-index media [33], whose metamaterial implementations [34] are know to be highly dispersive and prone to losses; this inherently curtails bandwidth and efficiency. In [35], Sun et al proposed a different, TO-based approach to design twodimensional (2-D) arbitrarily shaped metamaterial radomes yielding a desired (e.g., linear) relationship between the input and output angles. To overcome the significant complexity of the resulting (anisotropic, inhomogeneous) transformation medium to be implemented, the same authors subsequently put forward a modified approach [36], whose implementation relies on the previously introduced "optical null medium" [37].…”

Surface Transformation With Homogenous Optic-Null Medium

“…Many scattering-related problems can be tackled with the help of TO, e.g., cancelling the scattering pattern of an arbitrarily shaped object [1,[5][6][7], steering the radiation angle [8,9], creating the scattering illusions [10][11][12][13]. Due to the development of metamaterials (i.e., a kind of artificial materials composed of some subwavelength structures) [14], many devices designed by TO have been fabricated and experimentally demonstrated.…”