7.3m Antenna
Ku-Band 4-Port
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The antenna system consists of dual shaped Cassegrain reflectors with backup structure, a frequency reused feed assembly with corrugated horn, an elevation-over-azimuth limit motion kingpost pedestal., the hub connecting the main reflector with mount. The pedestal provides the guaranteed pointing accuracy required in C band operations.
Antenna system is characteristic of high gain, low sidelobes, low cross polarization, capable for frequency reuse both in transmit and receive bands, high driving/control accuracy with angle position display in high resolution.
The radiation patterns meet the associated requirements of INTELSAT IESS, and CCIR for satellites at 2 degrees spacing location in geo- stationary orbit.
- Frequency Range
- Rx: 12.20 - 12.75 GHz
- Frequency Range
- Tx: 14.0 - 14.75 GHz
- Gain
- Rx: 57 dB min; Tx: 58.2 dB min.
- Antenna Noise Temperature
- 72K @ 10° Elevation
- Antenna Noise Temperature
- 54K @ 20° Elevation
- Antenna Noise Temperature
- 45K @ 40° Elevation
- V S W R
- Rx: 1.3: 1; Tx: 1.3: 1
- Sidelobe Pattern
- First sidelobe level less than -14dB
- Sidelobe Pattern
- Beyond first sidelobe meet IESS(Intelsat) or CCIR 580-4 Recommendation
- Cross Pol. Discrimination
- 35dB (On axis) ; 30dB (within 1 dB Beamwidth)
- Feed Insertion Loss
- Rx: 0.50 dB; Tx: 0.60 dB
- Power Handling Capability
- 2 KW
- Port to Port Isolation
- 80 dB
- Feed Interfaces
- Rx: WR75F; Tx: WR75F
- Pedestal Type
- Limited Motion, El.over Az., Kingpost
- Azimuth Travel
- 180° in total
- Elevation Travel
- 0 to 90°
- Polarization Travel
- ±45°
- Reflector
- Aluminum
- Backup Structure
- Steel
- Pedestal Structure
- Steel
- Finish
- Pedestal and Steel Structure: Sand blast and hot spray galvanized and two times paint
- Finish
- Reflector Surface: Aluminum panels with heat-diffusing white paint
- Surface Accuracy
- 0.6mm(RMS)
- Antenna drive mode
- Motor Drive
- Operation Wind
- 50km/h gusts to 97km/h
- Survival Wind
- 200km/h
- Ambient Temperature
- -40°C to +60°C
- Rain
- up to 100mm/h
- Relative Humidity
- up to 100%
- Radial Ice (Survival)
- 25mm on all surface or 13mm on all surface with 130km/h wind gusts
- Shock & Vibration
- As encountered during shipment by commercial air, sea or truck
- Corrosive atmosphere
- As encountered in coastal regions and/or heavily industrialized areas
- Seismic (Survival)
- 0.3G’s horizontal
- Seismic (Survival)
- 0.1G’s vertical
Specific References
Ku-Band 4-Port