公开(公告)号：US10446933B1

公开(公告)日：2019-10-15

申请号：US15904822

申请日：2018-02-26

Applicant: General Atomics

Inventor： Jonathan Neil Bringuier

IPC: H01Q1/00 ,  H01Q7/08 ,  H01Q1/36 ,  B23P19/04 ,  G01R33/09 ,  H03C7/02 ,  H01Q1/12 ,  H01Q7/06 ,  H01Q13/24

Abstract: Magnetic antenna techniques and devices are disclosed for operating at an RF or microwave frequency by using a magnetic antenna structure that is configured to have a spatially varying property that varies spatially from one location to another location in at least a portion of the magnetic antenna structure. Such a spatial varying property can be reflected in various ways, e.g., a resonator located in part of the magnetic antenna structure, or a spatially varying geometry profile in part of or the entirety of the magnetic antenna structure.

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.