Gilat Satellite Networks
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Confidential and Proprietary Information
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9
Table 2: Antenna components
C
C
o
o
m
m
p
p
o
o
n
n
e
e
n
n
t
t
D
D
e
e
s
s
c
c
r
r
i
i
p
p
t
t
i
i
o
o
n
n
1
Azimuth Motor
Control
Control unit for the azimuth motor.
2
Azimuth Motor
A belt-driven motion mechanism that turns the rotating
platform in azimuth based on RSSI power levels and gyro
block readings.
3
Two-Axis Gyro
The gyro block and inclinometer control part of the antenna
acquisition and tracking process. They ensure tracking under
normal conditions and maintain the orientation of the
antenna toward the satellite for some period during
blockages, when the satellite signal is not available.
4
Panel
The panel consists of a multi-layer structure of two-port
radiating elements and a complex low loss feeder system. It
operates with two orthogonal polarizations, which are later
used for precise linear polarization control.
5
Rotating Platform
Contains all antenna parts and it is attached to the static
platform by a central bearing and peripheral damping rollers.
6
Static Platform
Base of the entire antenna that holds the rotating platform, a
top cover radome, a connector box and four mounting
dampers.
7
LNB and Rx Pol
Control
Standard PLL-based device that down-converts different
receive signal frequencies to IF band.
8
Elevation Motor
Positions the panel to the proper elevation angle using a
stepper motor and a belt-driven pulley. An elevation home
sensor is used to define the initial position of the panel.
