4.5m Antenna

C-Band

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4.5M antenna adopts Dual Shaped Compact Cassegrain precision-formed reflector mounted on a Az.over El. pedestal providing necessary stiffness and pointing accuracy required in C band operation. It is provided with a Rx/Tx (2 ports) feed with corrugated horn and OMT and is of optimized R.F. specification, operates in circular or linear polarization selectable manually and meets any requirements of customers for particular applications.

4.5M antenna meet the regulations of CCIR 580-4 and have been type approved by ASIASAT and INTELSAT. The 4.5M antenna can enter ASIASAT-2 and INTELSAT Network without the need of certification test after installation on sites.  

Frequency Range
Rx: 3.625 - 4.200 GHz
Frequency Range
Tx: 5.850 - 6.425 GHz
Gain
Rx: 43.6 dB min; Tx: 47.1 dB min.
Antenna Noise Temperature
36K @ 10° Elevation
Antenna Noise Temperature
31K @ 20° Elevation
Antenna Noise Temperature
26K @ 40° Elevation
V S W R
Rx: 1.3:1 (LP); 1.25:1 (CP)
V S W R
Tx: 1.3:1 (LP); 1.25:1 (CP)
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)
Axial Ratio (CP only)
Rx: 1.5; Tx: 1.0
Feed Insertion Loss
Rx: 0.20 dB; Tx: 0.10 dB
Power Handling Capability
3 KW
Port to Port Isolation
85 dB
Feed Interfaces
Rx: CPR-229F; Tx: CPR-137G
Azimuth Travel
120° continuous, 360° in total
Elevation Travel
0 to 90°
Shipping Weight
1500 kg
Shipping Volume
8.2 cube meter
Reflector
Aluminum
Backup Structure
Steel
Pedestal Structure
Steel
Finish
Reflector Surface: Aluminum panels with heat-diffusing white paint
Finish
Pedestal and Steel Structure: Sand blast and hot spray galvanized and two times paint
Foundation
5.0m x 5.0m
Antenna drive mode
Manual, Motorization drive optional
Operation Wind
50km/h gusts to 97km/h
Survival Wind
200km/h or 80m/s optional
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