Space laser communication optical antennas have very high requirements for
the stability and uniformity of the temperature field. The GEO
satellite-borne laser communication is affected by the violent alternating
solar heat flow, which causes the thermal disturbance of the in-orbit
temperature field of the extra-satellite optical antenna to become unstable.
Reduce optical communication time. For this reason, the paper proposes a
?sun window? as a solar spectral filter device to shield solar radiation,
combined with the thermal design of the optical antenna system, based on
thermal simulation analysis to study the effectiveness of the solar window
to suppress the thermal disturbance of the optical antenna temperature
field. The research results show that the thermal control optimization
design of the optical antenna system based on the "sun window" has a
significant effect in suppressing the thermal disturbance of the optical
antenna temperature field: the stability of the temperature field of the
primary mirror is increased by 2.2 times, the stability of the temperature
field of the secondary mirror is increased by 10.6 times. The uniformity of
the temperature field of the secondary mirror is increased by about ten
times, and the time that meets the requirements of the stability and
uniformity of the optical communication antenna temperature field can be up
to 24 hours per day, which is more than three times that of the solution
without the "sun window".
A COMPACT MIMO ANTENNA SYSTEM DESIGN WITH LOW CORRELATION FROM 1710 MHZ TO 2690 MHZ
