The Synergetics Model 15A is a hemispherically omni-directional antenna optimized for maximum gain at low elevation angles. The 15A is a lightweight, resonant, full-wave Quadrafilar Helix antenna phased for right-hand circular polarization. The pattern is optimally shaped to give maximum gain just above the horizon (where path losses are minimal). The model 15A antenna provides improved performance over the half-wave Quadrafilar Helix (14A) for all low-orbiting satellite applications. The 15A will also provide optimum performance for satellite platforms located at higher latitudes. For platforms with look angles above 45 degrees elevation, the model 14A antenna should be used. The 15A antenna is matched using the exclusive Synergetics MICRO-FEED, resulting in superior axial ratio, SWR, and bandwidth. The sealed radome is constructed of G-10 fiberglass with a white, two-part polyurethane paint for long life under hostile atmospheric conditions.

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