Antenna 1,2 / 1,5 mt. Offset for DSNG system
The antenna is a Gregorian type reflector of 1,2m dimension (double reflector system) with a subreflector that enables uniform feed illumination, maximal efficiency and low secondary lobes. The principal reflector is constituted by a support structure with one dish in reinforced aluminium. The dish is manufactured with the best shape for the highest electromagnetic performance. The subreflector is fixed directly at the feed arms without any regulation: the auto-alignment system allows to fix the subreflector in the correct position (the same for the feed). The feed has a corrugated horn for better symmetric patterns and low secondary lobes. The OMT (Ortho Mode Transducer) facilitates the two ports to allow both transmission and reception in linear polarization. The antenna features also a motorized handling in three axes (azimuth, elevation and polarization). The command to move and check the antenna handling is supervised by the ACU “ASC0003B” (Antenna Satellite Controller). The antenna is provided with a 1 -bit Optical Encoder (for azimuth and elevation axes) and with a potentiometer for the polarization axis. All cables between the Antenna and the ACU are provided. Azimuth, elevation and polarization switches limit is installed and connects directly to the ACU for the safety control of the antenna handling.