This series of panel antennas have been designed for three-sided arrays and provides a customized horizontally polarized coverage for single or multistation use in Band III. Model 657 has a nominal gain of 7dBd and the 658 has a nominal gain of 10dBd.
Construction from a thick-walled tube and solid steel bar gives a heavy-duty panel which is designed for operation in very harsh environments. This design also ensures ideal hot-dip galvanizing for optimum corrosion protection. Colours are available for aviation visibility and even further corrosion protection.
The coaxial feed system can be fully pressurized and features twin "O" ring seals on the feed point insulators. The panels are tolerant of light icing (radomes are available for use under heavy icing conditions down to -40 degrees C) and have a very low VSWR (typically less than 1.05:1) over the entire 174 - 230MHz band depending on the system configuration.
These panels are ideal array elements for a triangular mast with a 1.2m face and can provide omnidirectional patterns with <1 dB variation. By varying the number and positions of panels and feed amplitude/phase, patterns can be customized to optimize coverage over a given service area. The use of three panels around the structure offers significant cost and wind load reduction over four-sided arrangements.
FEATURES / BENEFITS
Suitable for single or dual channel use
Three-sided array design - lower cost
Rugged galvanized steel construction for maximum corrosion protection
Low wind load
Pressurizable coaxial feed
Array design allows a variety of standard horizontal radiation patterns as well as customised patterns, contact RFS for details
Medium power, unpressurized version available
Temperature range -40 to +60 degrees C available
For detailed technical information use the external document link below.
657 and 658 Antenna Series showing 657 Panel Array