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Antennas on the Web

Picture Archive: Illinois Historic Archive

• Array of four log-periodic dipole arrays used for tracking.
• Array of four triangular tooth log-periodic antennas.
• Details of infinite-balun feed for a planar log-spiral antenna.
• Conical log-spiral antenna.
• Vertically polarized log-periodic array for use at HF.
• Planar log-spiral slot antenna.
• Vertically polarized log-periodic zigzag antenna.
• University of Illinois radio telescope for extra-galactic sources.
• University of Illinois radio telescope.
• Conical log-spiral antennas.
• Array of two conical log-spiral antennas.
• Log-periodic array of helical dipoles.
• Array of four conical log-spiral antennas.
• Early diagram of scaled cells of a general log-periodic structure.
• Four-arm conical log-spiral antenna #1.
• Four-arm conical log-spiral antenna #2.
• Early commercial version of a wire-outline log-periodic array.
• Horizontal array of two log-periodic dipole arrays.
• Two conical log-spiral antennas; (left) wide arm (right) cable arm.
• Small scale model of log-periodic resonant-V array.
• Conical log-spiral antenna.
• Small scale model of a log-periodic dipole array.
• Loosely wrapped four-arm conical log-spiral antenna.
• Reflector feed.
• Planar log-spiral slot antenna.
• Conical log-spiral antenna made from coaxial cable #1.
• Conical log-spiral antenna made from coaxial cable #2.
• Conical log-spiral antenna made from coaxial cable #3.
• Two-element array of conical log-spiral antennas.
• Conical log-spiral for University of Illinois radio telescope #1.
• Conical log-spiral for University of Illinois radio telescope #2.
• Quad array of conical log-spiral antennas.
• End-on view of four-arm conical log-spiral antennas.
• Two-element array of conical log-spiral antennas with radome.
• Conical log-spiral for University of Illinois radio telescope.
• Log-spiral antenna on an early navigation satellite.
• Small scale model of a log-periodic dipole array.
• Conical log-spiral antenna.
• Commercial conical log-spiral antenna.
• Conical log-spiral antenna #1.
• Conical log-spiral antenna #2.
• Conical log-spiral antenna #3.
• Conical log-spiral antenna #4.
• Conical log-spiral antenna #5.
• Conical log-spiral antenna #6.
• Four overlapping parabolic reflectors #1.
• Four overlapping parabolic reflectors #2.
• Wide-aperture radio-location array.