TY - JOUR
TI - Analysis of influence of the solar window's thermal characteristics on thermal stability of optical communication antennas
AU - Shi Zhaoqiang
AU - Ma Zhuang
JN - Thermal Science
PY - 2021
VL - 25
IS - 4
SP - 3041
EP - 3051
PT - Article
AB - 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".