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The GS-420 glide slope antenna was designed, tested and certified as part of the new generation and more stable ILS-420 system. The GS-420 antenna contains numerous improvements over existing glide slope antennas.
Improvements Include:
• Extremely stable monitor coupling and phase operation over the environment service conditions, as well as during dipole heater operation.
• Improved sealing of the antenna.
• Improved vibration tolerance, in both transportation and installed conditions.
• Improved dipole design.
• Improved solderability.
• More precise tuning and phase matching of cables.
Spec Sheet
SPECIFICATIONS
PERFORMANCE
Frequency Range
328-336 MHz
Impedence
50 Ohms
RF Power
50 Watts CW
Monitor Coupling
-6 to -10 db over 328-336 MHz
Polarization
Hoizontal
Cross Polarization
At least -25 dB as measured in front of the antenna and within +/- 25 degrees in azimuth of a vertical plane perpendicular to the reflector and passing through the center of the antenna array
Front-To-Back Ration
More than 16 db
VSWR
1.2:1 Max over 328-336 MHz
Gain
More than 10 dBi
Horizontal Radiation Pattern
Between the upper and lower limit lines as shown in following table
Vertical Radiation Pattern
Symmetrical around 0 degrees elevation and decreasing smoothly in amplitude in either direction from 0 degrees elevation.
Dipole Phase
Left and right dipoles with 20-30 degrees phase of center dipole
Monitor Stability Signal Level
Constant within +/- 0.2 dB over the service condition range; track other antennas within 0.15 dB.
Monitor Amplitude Stability Test
Max change from baseline is +/- 0.075 dB when heaters are energized.
Phase Stability Test
Max change from baseline is +1.1 degrees, -0.4 degrees when heaters are energized.
We have been designing and manufacturing antennas & systems for military and defense, government, aviation, transportation, and wireless infrastructure industry segments.
We would like to update you on some of the latest news concerning the COVID-19 virus. The health and safety of our customers and staff is of the utmost importance and we are taking significant precautions to ensure we are doing our part during these challenging times. Due to these changing circumstances, our offices will be operating at less than maximum capacity and our response to your emails or phone calls may be slower than normal. We apologize for any inconvenience this may cause and appreciate your patience while we work through the developing situation.
Please note that we will continue to operate (in varying capacities) with all the current information available until otherwise directed and promise to assist you in the most efficient way through many of the new safety protocols we are implementing. As new information becomes available, we will adapt to the on-going and changing circumstances and keep you informed.
As a U.S. based manufacturer we are doing our best to accommodate customers whose supply chains have been disrupted so please contact us immediately if you require any time sensitive mission critical equipment.
