A Hybrid Free-Space Optical (FSO)/Radio Frequency (RF) Antenna for Satellite Applications

Satellite units use reliable, an industrial de facto standard, and scientifically approved method of radio frequency (RF) data transfer. However, RF links are slow and require authorized permission for satellite and in-orbit applications. Recently, free-space optical (FSO) communication links are trending for satellite applications due to their huge potential for data transmission and low-cost implementation. Ideally, satellites would benefit from both RF and FSO technologies to ensure robustness and reliability. However, such a communication system requires the use of dedicated antenna and aperture for RF and FSO, respectively. The key challenges in the satellite transceiver systems are the size and mass. Therefore, having two separate units for each technology is not desirable. In this paper, we present a unique, compact, robust, and flexible design, which integrates optical wireless communication front-end aperture and radio antenna in a single module. We will present the design concept as well as RF and optics simulation results.