Antenna system with spatial filtering surface

Details Antenna system with spatial filtering surface Antenna system with spatial filtering surface

2005-05-31

2005-05-31

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S756000, C343S909000, C333S202000

Reexamination Certificate

active

06900763

ABSTRACT:
An antenna system includes a ground plane and/or antenna elements forming an antenna array. A spatial filtering surface is positioned adjacent the antenna array through which electromagnetic radiation to or from the antenna array passes. The spatial filtering surface includes a dielectric substrate and a plurality of spaced, geometric configured, resonant elements printed on the dielectric substrate and configured and spaced from each other to have a resonant frequency to filter an electromagnetic field at a selected frequency with respect to an angle of incidence to the dielectric substrate. A dielectric filler is positioned between, above and below each resonant element printed on the dielectric substrate. A spatial filter taper transform is imparted when electromagnetic radiation passes therethrough. A standing wave is created between the ground plane and spatial filtering surface.

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