Mechanical Data Ø 2.0 m SP, SXP antennas.            

 

 

MATERIAL AND TREATMENT.

A parabolic aluminium reflector, which is spray, painted. Standard colour is grey RAL7038. The mount and rear structure is made of hot dip galvanised steel. All screws, nuts and washers are made hot dip galvanised steel class 8.8. The antenna can be delivered with spherical radome. Depending on frequency band the feed is made of brass or hot dip brazed aluminium. Further information is given in data-sheet for actual frequency range.

 

WEIGHT AND DIMENSIONS.

Dimensions in mm according to figure 1.


Weight 95 kg.

 

INTERFACE:

115 mm column with minimum length 1250 mm. 
          

ALIGNMENT:

 

                Coarse:                   Azimuth  + 50o (depends on column installation)

                Fine :                      Both planes  + 8o   

 

 

Environment:

Wind  

 

Survival without permanent deformation.

               

                Wind speed up to 70 m/s and 25 mm radial ice.

                Maximum deflection at 45 m/s is 0.1 o.

 

Temperature range:          -55 oC  to  +55 oC

Atmosphere:

 

The antenna is designed to meet coastal and industrial atmosphere with 100% relative humidity.

Wind effect on parabolic antennas and support structures can be separated into two force components and a twisting moment as shown in figure 2.

The side axial and twisting moment forces shown in table 1 are maximum values exerted on the supporting structure. In every case the value is the result of the wind from the most critical direction. All forces are referenced to the antenna mounting column



Figure 2 : Wind effect on parabolic antennas and supporting structure.

 

 

Table 2 : Wind without radome

Wind speed

Maximum Axial force N ( kp)

Maximum Side force   N ( kp)

Maximum Twisting moment Nm (kpm)

55 m/s  (200 km/h)

9885 (1008)

2912 (297)

3805 (388)

70 m/s  (252 km/h)

15665 (1597)

4620 (471)

6033 (615)

 


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