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.