Wideband Directional Antenna System With Minimized Volumetric Signature
AssigneeFractal Antenna Systems, Inc.
InventorsNathan Cohen, Joseph Theil
Life of this patent
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Abstract
Systems, circuits, apparatus, and methods provide directional antenna suites that allow unprecedented wideband directional antenna performance within a small volumetric region. The antenna suites include multiple antennas each covering a different operational frequency band. An antenna system can include a frame housing a number of separate antennas used for the antenna suite (ensemble); the separate antennas can include one or more helical or spiral antennas; other types of antennas may be included, e.g., Yagi antenna and/or fractal Yagi antenna.
Claims19
An antenna system comprising:
- a frame defining an enclosed volume defined by three orthogonal dimensions, wherein at least one dimension is a maximum dimension;
- and
- a plurality of antennas disposed within the enclosed volume, wherein each antenna of the plurality of antennas is directional, wherein each antenna is configured to operates over a different passband, and wherein the plurality of antennas includes a lowest-frequency antenna having a lowest-frequency passband including a lowest frequency, wherein the lowest frequency defines a longest operation wavelength of the plurality of antennas;
- wherein the enclosed volume has a maximum dimension in any direction that is less than one-quarter of the longest wavelength of the lowest-frequency passband.
A method of making an antenna system including an antenna suite, the method comprising:
- providing a frame defining an enclosed volume;
- and
- providing a plurality of antennas within the enclosed volume, wherein the
- plurality of antennas includes a plurality of helical antennas;
- wherein each antenna of the plurality of antennas is directional, wherein each antenna is configured to operates over a different passband, and wherein the plurality of antennas includes a lowest-frequency antenna having a lowest-frequency passband including a lowest frequency, wherein the lowest frequency defines a longest operation wavelength of the plurality of antennas;
- wherein the enclosed volume has a maximum dimension in any direction that is less than one-quarter of the longest wavelength of the lowest-frequency passband.
Dependencies are inferred from the claim text.