UC-1464-433, VHF Amateur Satellite Antenna

The UC-1464-433 is a compact Quadrifilar Helix antenna (16 cm/6" OD x 32 cm/12.5" H) designed to operate through Amateur Radio satellites, without requiring an antenna rotator. The goal of this product is to offer Radio Amateurs with severe space or community restrictions the ability to communicate via OSCAR series satellites. Ham satellites generally operate cross-band: you will generally need an UHF downlink receive antenna for 2-way communications. A companion UHF unit is available here: UC-4364-328 Satellite Antenna.

Useful web pages about Amateur Satellites and relevant polarization are below:

• AMSAT Satellite Status page
• "The Case For Polarization Switching" by Jim White, WD0E
• "Telemetry Data Collection from OSCAR Satellite" by P.C. Haddock & S. Horan
• "Types of Antennas for Satellite Work" by Bruce Paige, KK5DO
• Listing of OSCAR beacon and telemetry frequencies (AMSAT)

• Frequency range: 144-147 MHz
• Coverage: Omni-directional, Hemispherical
• Polarization: Circular (AR 1 dB)
• Peak Gain: +2 dBic (free space) [up to +4 dBic if mounted over a ground plane/ground]
  Elevation pattern (free space - NO Ground Plane)
• Nominal Impedance: 50 ohm (RF) / Short Circuit (DC)
• Input Power: 50 Watt CW
• VSWR: 2.0 GRAPH
• Connector: UHF, Male (PL-259 like) on 10 ft (3m) length of LMR195 coaxial cable (or equivalent)
• Dimensions:
  • Housing 16 cm (6") OD x 32 cm (12.5") h
  • Bottom flange 19 cm (7.5") OD x 10 mm (0.38") h
• Mounting: 8 screws, M6 (#1/4-20)
• Operating Temperatures: -40C to +85C
• Weight: 1.7 kg / 3.5 lbs
• Shipping Weight: 2 kg / 4 lbs

• Does not require a ground plane