公开(公告)号：US11264728B1

公开(公告)日：2022-03-01

申请号：US16358667

申请日：2019-03-19

Applicant: General Atomics Aeronautical Systems, Inc.

Inventor： Jonathan Neil Bringuier ,  John D. Fanelle

IPC: H01Q19/19 ,  H01Q19/02 ,  H04B7/0456

Abstract: Disclosed are devices and methods for selecting, at an antenna reflector, electromagnetic waves with a certain polarization and frequency and rejecting electromagnetic waves with different polarizations and/or frequencies. In one aspect, a directional antenna includes a shaped reflector surface with a series of conforming layers attached to the surface. The layers include a reflecting layer that causes reflection of electromagnetic waves at a specific frequency and polarization. Underneath the reflecting layer is a frequency selective surface (FSS) layer that absorbs electromagnetic waves not at the specific frequency or polarization which pass through the reflecting layer. Underneath the absorbing layer is a conductive layer.