HIGH GAIN TETRA ANTENNA

Design Features: The SD3-400 ultra high performance TETRA band stacked dipole array is designed for use with highly populated radio sites requiring long haul omni-directional coverage. The SD3-400 is heavy duty stacked dipole array features, wide bandwidth, high gain, high power handling capacity, low VSWR, low noise performance and null filling coverage with omni-directional characteristics. This stacked dipole array maintains constant gain and VSWR over its entire 40 MHz bandwidth, making it highly suitable as base station antennas for TETRA systems, repeater, paging and any other multi-channel communication systems.
Constructions: The SD3-400 stacked dipole array uses 6063T6 ultra corrosion resistant architectural anodized aluminum, consists of two folded dipoles stacked vertically, fed in phase. The center fed dipole ends and cable connections to the dipoles are sealed in epoxy at the end of the boom for protection against weather and imparting rigidity and strength to the dipole structure. All fasteners are made of stainless steel.
Radiation Pattern: When the two dipoles are arranged 180 degrees apart around the central mast, 3dBd. omni directional radiation pattern results. Aligning both dipoles collinearly (facing in one direction) a 6dBd. offset radiation pattern is obtained. The radiation pattern can be changed in the field by use of common hand tools. Vertical stacking distance is factory adjusted for highest efficiency.
Phasing Harness: Specially designed center fed phasing harness ensures equal and in phase signal distribution to both the dipoles. All power splitter joints are molded to avoid use of connector/adapters to minimize loss and molded N-Female antenna termination connector ensures complete waterproofing.
Direct Ground: This Stacked Dipole Antenna operates at D.C. ground for protection against lightning. The dipoles are mounted on a tubular boom made of high strength aluminum alloy, which offers a low resistance discharge path against any lightning strike during stormy weather.
Shipping: The antenna can be supplied in assembled or dismantled condition as per customer choice. The stacked dipole array is supplied with standard stainless steel pole mounting hardware.