4.8 Meter Ka-Band Antenna

The Strength to Perform

The General Dynamics SATCOM Technologies 4.8-meter antenna delivers exceptional performance for transmit/receive for Ka-band frequencies. This antenna offers a deep dish reflector that incorporates high, precision-formed panels, and contoured radials and hub assembly. It features an innovative feed and subreflector design which results in high gain, low noise temperature, high antenna efficiency and excellent rejection of noise and microwave interference.

The aluminum reflector is supported by a galvanized pedestal that provides high stiffness for Ka-band operation.The pedestal is designed for full orbital arc coverage and is readily adaptable to ground or rooftop installations. The electrical performance is compliant with ITU, EUTELSAT, WGS, and FCC sidelobe specifications. All configurations meet SATCOM Technologies’ own type-approved quality assurance and performance guarantee.

Features

  • High-accuracy, precision reflector 
  • Bolt-together reflector, galvanized steel pedestal
  • 31 GHz operation, meeting ITU, EUTELSAT, WGS, FCC
  • Low backlash
  • Feed internal pol adjustment (LP) option
  • 125 mph (200 km/h) wind survival
  • High-wind option

Options

  • Fixed or motorizable pedestal mounts
  • Antenna control system with tracking
  • Reflector and feed deicing systems
  • Environmental hub configurations
  • 1:1 and 1:2 pre-engineered amplifier integration kits
  • Integrated LNA or LNB systems
  • HPAs, converters and M&C systems
  • Improved feed cross-pol performance
  • Multi-band feeds
  • Load frame or non-penetrating mounts
  • Packing for sea and air transport
  • Turnkey installation and testing
  • High-wind configuration

Upgrades

  • Extended azimuth travel
  • Low operating temperatures

Specifications

Ka-Band 4-Port Circular Polarized
Ka-Band 4-Port LinearPolarized
Electrical (1) Receive Transmit Receive Transmit
Frequency (GHz)
17.70 -
21.20

27.50 -
31.00

17.70 -
21.20
27.50 -
31.00
Antenna Gain, Midband dBi  57.10 60.20 57.00 60.10
VSWR 1.30:1  1.30:1  1.30:1  1.30:1
Pattern Beamwidth
-3 dB, at midband

.21°

0.15°

0.21°

0.15°
Antenna Noise Temperature (K)
5° Elevation
10° Elevation
20° Elevation
40° Elevation

207
165
133
108

203
162
131
106
 
Typical G/T (dB/K) (2)
33.1
(19.45 GHz, 120 K LNA)
33.0
(19.45 GHz, 120 K LNA)
 
Axial Ratio (dB) 0.75  0.50  
Power Handling (total)    400 Watts    400 Watts
Cross Polarization Isolation (dB)
On Axis
Within 1.0 dB beamwidth

27.3
27.3

27.3
27.3

30.0
30.0

30.0
30.0
Port to Port Isolation (dB)
- Rx/Tx (Rx frequency)
- Tx/Rx (Tx frequency)
RF Specification

0
-85
975-3056

-85
0
975-3056


0
-85
975-4488

-85
0
975-4488
Sidelobe Performance  ITU, EUTELSAT, WGS, FCC

 

Mechanical/Environmental (3) Fixed Post Mount Pedestal (PM) Motorized Kingpost Pedestal Motorizable High Wind Kingpost Pedestal (KP-HW)
Antenna Diameter 4.8 meters (15.83 feet)
Antenna Type Compact Cassegrain design
Reflector Construction Vigorous inspection for Ka-band rating
16 precision-formed aluminum panels with heat-diffusing white paint
Cleaned and brightened aluminum back-up structure
Hub Dimensions 48 in (122 cm) OD, 29 in (74 cm) depth
Mount Configuration Elevation over azimuth pedestal, constructed of galvanized A36 steel
Drive Type
Azimuth Travel
Elevation Travel
Manual struts
360° coarse, 40° fine adjustment
0 to 90° continuous
Manual Strut or jack screws
120° continuous
0 to 90° continuous
Manual jack screws
120° continuous
0 to 90° continuous
Foundation (L x W x D)
Concrete
Reinforcing Steel
12.5 x 12.5 x 1.5 ft (3.8 x 3.8 x 0.38 m)
8.7 yds³ (6.65 m³)
1,125 lbs. (510 kg)
16.5 x 16.5 x 2.5 ft (5.0 x 5.0 x 0.76 m)
25.5 yds³ (19.5 m³)
1,680 lbs. (762 kg)
Shipping Containers One 20 ft standard (4 units in one 40 ft)  One 20 ft standard (2 units in one 40 ft)  Two units in one 40 ft standard
Operational Wind Loading
Survival Wind Loading
- Any position
- At Zenith
45 mph (72 km/h) gusting to 60 mph (97 km/h)

125 mph (200 km/h) @ 58° F (15° C),
n/a
Up to 62 mph (100 km/h)

180 mph (290 km/h) @ 58° F (15° C)
210 mph (338 km/h) @ 58° F (15° C)
Operational Temperature
Survival Temperature
+5° to +122° F (-15° to +50° C)
-22° to +140° F (-30° to +60° C), low temperature options available
Rain Up to 4 in/h (10 cm/h)
Relative Humidity 0 to 100% with condensation
Solar Radiation 360 BTU/h/ft² (1,000 Kcal/h/m²)
Ice (survival) 1 in (2.5 cm) on all surfaces or 1/2 in (1.3 cm) on all surfaces with 80 mph (130 km/h) wind gusts
Atmospheric Conditions As encountered in coastal regions and/or heavily industrialized areas
Shock and Vibration As encountered during shipment by airplane, ship or truck

(1) All values are at rear feed flange. (2) Typical G/T at 20Æ elevation with clear horizon using single bolt-on LNA to feed. 

(3) Some specifications may vary based on the combination of equipment, options and/or upgrades ordered.

  • Features

    The aluminum reflector is supported by a galvanized pedestal that provides high stiffness for Ka-band operation.The pedestal is designed for full orbital arc coverage and is readily adaptable to ground or rooftop installations. The electrical performance is compliant with ITU, EUTELSAT, WGS, and FCC sidelobe specifications. All configurations meet SATCOM Technologies’ own type-approved quality assurance and performance guarantee.

    Features

    • High-accuracy, precision reflector 
    • Bolt-together reflector, galvanized steel pedestal
    • 31 GHz operation, meeting ITU, EUTELSAT, WGS, FCC
    • Low backlash
    • Feed internal pol adjustment (LP) option
    • 125 mph (200 km/h) wind survival
    • High-wind option

    Options

    • Fixed or motorizable pedestal mounts
    • Antenna control system with tracking
    • Reflector and feed deicing systems
    • Environmental hub configurations
    • 1:1 and 1:2 pre-engineered amplifier integration kits
    • Integrated LNA or LNB systems
    • HPAs, converters and M&C systems
    • Improved feed cross-pol performance
    • Multi-band feeds
    • Load frame or non-penetrating mounts
    • Packing for sea and air transport
    • Turnkey installation and testing
    • High-wind configuration

    Upgrades

    • Extended azimuth travel
    • Low operating temperatures

  • Specifications

    Specifications

    Ka-Band 4-Port Circular Polarized
    Ka-Band 4-Port LinearPolarized
    Electrical (1) Receive Transmit Receive Transmit
    Frequency (GHz)
    17.70 -
    21.20

    27.50 -
    31.00

    17.70 -
    21.20
    27.50 -
    31.00
    Antenna Gain, Midband dBi  57.10 60.20 57.00 60.10
    VSWR 1.30:1  1.30:1  1.30:1  1.30:1
    Pattern Beamwidth
    -3 dB, at midband

    .21°

    0.15°

    0.21°

    0.15°
    Antenna Noise Temperature (K)
    5° Elevation
    10° Elevation
    20° Elevation
    40° Elevation

    207
    165
    133
    108

    203
    162
    131
    106
     
    Typical G/T (dB/K) (2)
    33.1
    (19.45 GHz, 120 K LNA)
    33.0
    (19.45 GHz, 120 K LNA)
     
    Axial Ratio (dB) 0.75  0.50  
    Power Handling (total)    400 Watts    400 Watts
    Cross Polarization Isolation (dB)
    On Axis
    Within 1.0 dB beamwidth

    27.3
    27.3

    27.3
    27.3

    30.0
    30.0

    30.0
    30.0
    Port to Port Isolation (dB)
    - Rx/Tx (Rx frequency)
    - Tx/Rx (Tx frequency)
    RF Specification

    0
    -85
    975-3056

    -85
    0
    975-3056


    0
    -85
    975-4488

    -85
    0
    975-4488
    Sidelobe Performance  ITU, EUTELSAT, WGS, FCC

     

    Mechanical/Environmental (3) Fixed Post Mount Pedestal (PM) Motorized Kingpost Pedestal Motorizable High Wind Kingpost Pedestal (KP-HW)
    Antenna Diameter 4.8 meters (15.83 feet)
    Antenna Type Compact Cassegrain design
    Reflector Construction Vigorous inspection for Ka-band rating
    16 precision-formed aluminum panels with heat-diffusing white paint
    Cleaned and brightened aluminum back-up structure
    Hub Dimensions 48 in (122 cm) OD, 29 in (74 cm) depth
    Mount Configuration Elevation over azimuth pedestal, constructed of galvanized A36 steel
    Drive Type
    Azimuth Travel
    Elevation Travel
    Manual struts
    360° coarse, 40° fine adjustment
    0 to 90° continuous
    Manual Strut or jack screws
    120° continuous
    0 to 90° continuous
    Manual jack screws
    120° continuous
    0 to 90° continuous
    Foundation (L x W x D)
    Concrete
    Reinforcing Steel
    12.5 x 12.5 x 1.5 ft (3.8 x 3.8 x 0.38 m)
    8.7 yds³ (6.65 m³)
    1,125 lbs. (510 kg)
    16.5 x 16.5 x 2.5 ft (5.0 x 5.0 x 0.76 m)
    25.5 yds³ (19.5 m³)
    1,680 lbs. (762 kg)
    Shipping Containers One 20 ft standard (4 units in one 40 ft)  One 20 ft standard (2 units in one 40 ft)  Two units in one 40 ft standard
    Operational Wind Loading
    Survival Wind Loading
    - Any position
    - At Zenith
    45 mph (72 km/h) gusting to 60 mph (97 km/h)

    125 mph (200 km/h) @ 58° F (15° C),
    n/a
    Up to 62 mph (100 km/h)

    180 mph (290 km/h) @ 58° F (15° C)
    210 mph (338 km/h) @ 58° F (15° C)
    Operational Temperature
    Survival Temperature
    +5° to +122° F (-15° to +50° C)
    -22° to +140° F (-30° to +60° C), low temperature options available
    Rain Up to 4 in/h (10 cm/h)
    Relative Humidity 0 to 100% with condensation
    Solar Radiation 360 BTU/h/ft² (1,000 Kcal/h/m²)
    Ice (survival) 1 in (2.5 cm) on all surfaces or 1/2 in (1.3 cm) on all surfaces with 80 mph (130 km/h) wind gusts
    Atmospheric Conditions As encountered in coastal regions and/or heavily industrialized areas
    Shock and Vibration As encountered during shipment by airplane, ship or truck

    (1) All values are at rear feed flange. (2) Typical G/T at 20Æ elevation with clear horizon using single bolt-on LNA to feed. 

    (3) Some specifications may vary based on the combination of equipment, options and/or upgrades ordered.

  • Literature

Back to top