6 SECTOR, MODE S SQUITTER, GROUND STATION, ADS-B ANTENNA
Specifications
Performance Characteristics:
Type: Six Beam, Directional
Azimuth Coverage: 60° Nominal HPBW each lobe. Gain > 13 dBi throughout 60° sector including edges. Gain >14 dBi over at least 70% of 60° sector. Mean gain < -21dB relative to main beam peak outside of ±70° from the main azimuth beam. See Figure 3.
Frequency Range: 1030 ± 5 MHz and 1090 ± 5 MHz (No adjustments or tuning required)
Array: 12 radiator assy's (85" tall)
Polarization: Vertically Polarized
Gain, main beam: >16 dB/iso, main horizontal plane
Gain, horizon: >14 dB/iso, main horizontal plane
Main beam elevation location: 3.5° ± 1° above horizon
Slope (Vicinity of horizon): 1 dB/° min
Power Handling Capability: Up to at least 5 kW peak RF power at 3% duty cycle
Impedance: 50 ohm nominal
VSWR: not greater than 2:1 measured at end of low loss cable not exceeding 5 feet in length.
Vertical Field Pattern: The radiation pattern of the antenna in the vertical plane has a lobe of energy not less than 6 degrees wide at the half-power points. The power gain at angles between 10 and 50 degrees below the horizon shall be lower than the power gain at the peak of the major lobe above the horizon by at least 16 dB. The power gain at angles between 6 and 20 degrees above the horizon shall be greater than a level which is 16 dB below the power gain at the peak of the major lobe above the horizon. The power gain at angles between 20 and 45 degrees above the horizon shall be greater than a level which is 22 dB below the power gain at the peak of the major lobe above the horizon. Coverage provided to 55 degrees above the horizon.
Size: 97" long x 23.8" Dia.
Weight: ˜ 250 lbs. (excluding obstruction light and mounting fixtures and other optional items).
Physical Design: Six radiating arrays backed by six reflector elements. Each array physically held in individual filament wound radome. Entire RF portion protected by radome.
Weather Proofing: Entire Antenna weather proofed. Removal /replacement of subassemblies possible without sealing compounds.
Antenna Mounting: 6 each 0.5" bolts on 20.50" Bolt Circle.
Wind Loading: Withstands without damage 100 mile per hour gusts
Monitor Ports: One coupling port for monitoring the signal radiated by each of the six antenna beams. Connector located at each plate/clamp, 50 ohm nominal impedance. Probe output level is 25 dB ± 1 dB below power level applied to main RF input connector.
Obstruction Light(s): Optional dual, red lamp obstruction light fixture. Connector is MS-3112E8-3P, 13 1/2" H x 12"W x 4"D 5.3 lbs.
Connectors RF: Type N Female, 2 each for each array. (12 Total).
Lightning Rod Assy: Air Terminal and Bracket, aluminum, painted white, includes pipe nipple, cap, 3/4" x 2" NPT with chemical film, rod 18"L x 0.5" Dia x 18 thds/" x 6 oz, bracket 4.5"L x 2.5"W x 0.75"H x 14 oz.
Back
Today's Date: Monday, February 06th 2012 12:52:40 AM MST