Fractal Antenna Systems, Inc.

Daniel Earle

Nathan Cohen

Philip Salkind

Ryan Thistle

A J Shelman-Cohen

Justin Mitchell

Vivaldi tapered slot and Vivaldi horn antennas that feature or include fractal plasmonic surfaces ('FPS') are described. Vivaldi slot antennas are described which include a conductive surface defining a tapered slot, with the conductive surface including a plurality of fractal resonators which form or constitute a fractal plasmonic surface (FPS). In some embodiments the fractal resonators can be defined by slots. In some embodiments the fractal resonators can include self-complementary features. In exemplary embodiments, two Vivaldi horn antennas may be used for a Vivaldi horn antenna. The two Vivaldi FPS antennas can be arranged in a crossed or cross configuration such that the two antennas are essentially perpendicular to one another and are therefore able to receive and transmit two orthogonal polarizations of radiation. The two antennas can be fed by separate respective feed lines. The two antennas can be mounted inside of a horn or casing.

Vivaldi horn antennas incorporating FPS

Cage antennas and related components are described. Such cage antennas include a shortened antennal element, such as a monopole (e.g., of approximately &#x215b;-wave height of a desired operational wavelength), which can be placed on a shortened ground plane (e.g., roughly quarter-wave size). A cage-like ensemble (e.g., a cage) can then be placed on top of but not touching the antenna element. The cage structure can have a fractal-based, folded, and/or pleated structure, among others. This cage structure can be produced either through a variety of means including but not limited to 3-D printing with either conductive materials or inductively coded materials.

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Waltham, MA, United States of America

Daniel Earle