Properties of hybrid FSO/RF link with 60 GHz RF backup link

Free Space Optic (FSO) is an optical wireless technology which uses optical beam for communication and transmission of data. FSO communication link offers gigabit data rates and low system complexity. On the other hand, there are negative atmospheric effects which have a bad influence on availability and reliability of connection. The main bad atmospheric effect is caused by fog due to similar diameter of fog particles which correspond with used wavelength in FSO. Radiofrequency (RF) links have lower data rates, but enable transmission of data in foggy atmospheric conditions. In hybrid FSO/RF lines is able to combine advantages of both systems and achieve higher link availability. This paper deals with atmospheric effects on the FSO and 60 GHz RF link.