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Photo Archive of Antennas

Illinois Historic Archive

Photo Source/Description
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Array of four log-periodic dipole arrays used for tracking.
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Array of four triangular tooth log-periodic antennas used for reflector feeds.
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Details of infinite-balun feed for a planar log-spiral antenna.
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna showing (left) spiral pattern etched on flat sheet of teflon-impregnated fiberglass and (right) after forming into conical shape and adding feed coax to one arm and dummy cable (to improve symmetry) to the other arm.
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Vertically polarized log-periodic array for use at HF.
Planar log-spiral slot antenna
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Planar log-spiral slot antenna.
Vertically polarized log-periodic zigzag antenna
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Vertically polarized log-periodic zigzag antenna with horizontal phasing stubs, sometimes called the "bent LP zigzag".
University of Illinois radio telescope for extra-galactic sources
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
University of Illinois radio telescope used to map extra-galactic sources, a 400 x 600 foot cylindrical parabolic reflector made by covering a shaped-earth excavation with asphalt and wire screen. A catwalk at 155 feet above the ground supports about 400 conical log-spiral antennas along the focal line. Scanning in one plane was achieved by the earth's rotation; in the other plane by physically rotating the circularly polarized spirals. The log-spiral antennas were designed by Prof. J. D. Dyson, the feed system was designed by Prof. Y. T. Lo.
University of Illinois radio telescope
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
University of Illinois radio telescope.
Conical log-spiral antennas
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antennas
Array of two conical log-spiral antennas
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Array of two conical log-spiral antennas.
Log-periodic array of helical dipoles
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Log-periodic array of helical dipoles.
Array of four conical log-spiral antennas
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Array of four conical log-spiral antennas.
Early diagram of scaled cells of a general log-periodic structure
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Early diagram of scaled cells of a general log-periodic structure.
Four-arm conical log-spiral antenna #1
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Four-arm conical log-spiral antenna constructed from coaxial cable.
Four-arm conical log-spiral antenna #2
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Four-arm conical log-spiral antenna constructed from coaxial cable.
Early commercial version of a wire-outline log-periodic array
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Early commercial version of a wire-outline log-periodic triangular tooth array.
Horizontal array of two log-periodic dipole arrays
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Horizontal array of two log-periodic dipole arrays.
Two conical log-spiral antennas; (left) wide arm (right) cable arm
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Two conical log-spiral antennas; (left) wide arm (right) cable arm.
Small scale model of log-periodic resonant-V array
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Small scale model of log-periodic resonant-V array.
Conical log-spiral antenna
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna.
Small scale model of a log-periodic dipole array
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Small scale model of a log-periodic dipole array.
Loosely wrapped four-arm conical log-spiral antenna
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Loosely wrapped four-arm conical log-spiral antenna for producing hemispherical coverage.
Reflector feed
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Reflector feed.
Planar log-spiral slot antenna
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Planar log-spiral slot antenna.
Conical log-spiral antenna made from coaxial cable #1
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna made from coaxial cable.
Conical log-spiral antenna made from coaxial cable #2
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna made from coaxial cable.
Conical log-spiral antenna made from coaxial cable #3
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna made from coaxial cable.
Two-element array of conical log-spiral antennas
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Two-element array of conical log-spiral antennas.
Conical log-spiral for University of Illinois radio telescope #1
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral for University of Illinois radio telescope.
Conical log-spiral for University of Illinois radio telescope #2
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral for University of Illinois radio telescope.
Quad array of conical log-spiral antennas
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Quad array of conical log-spiral antennas.
End-on view of four-arm conical log-spiral antennas
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
End-on view of four-arm conical log-spiral antennas.
Two-element array of conical log-spiral antennas with radome
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Two-element array of conical log-spiral antennas with radome.
Conical log-spiral for University of Illinois radio telescope
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral for University of Illinois radio telescope.
Log-spiral antenna on an early navigation satellite
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Log-spiral antenna on an early navigation satellite.
Small scale model of a log-periodic dipole array
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Small scale model of a log-periodic dipole array.
Conical log-spiral antenna
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna.
Commercial conical log-spiral antenna
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Commercial conical log-spiral antenna.
Conical log-spiral antenna #1
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna.
Conical log-spiral antenna #2
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna.
Conical log-spiral antenna #3
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna.
Conical log-spiral antenna #4
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna.
Conical log-spiral antenna #5
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna.
Conical log-spiral antenna #6
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Conical log-spiral antenna.
Four overlapping parabolic reflectors #1
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Four overlapping parabolic reflectors fed with log-periodic dipole arrays.
Four overlapping parabolic reflectors #2
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Four overlapping parabolic reflectors fed with log-periodic dipole arrays.
Wide-aperture radio-location array
Source:
Professor Paul Mayes, University of Illinois at Urbana-Champaign
Description:
Wide-aperture radio-location array: forty planar log-periodic zigzag monopoles in a circular array.
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