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} _S_ource: _{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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Photo Archive of Antennas

Illinois Historic Archive