Photonic Frequency Converter Performance Enhancement for Satellite Payloads

Doctoral thesis presenting a comprehensive study of RF frequency conversion modules engineered for satellite telecommunications payloads using integrated photonic components. This work directly addresses the practical challenge of supporting expanding satellite bandwidth demand while reducing payload weight and system complexity. The research examines satellite communication network topologies, payload architectural frameworks, RF mixer design fundamentals, and the integration of photonic technologies into operational systems. The thesis develops and rigorously evaluates two distinct converter architectures: one leveraging electro-absorption modulators and another employing semiconductor optical amplifiers. Detailed simulation analysis conducted with VPIphotonics software documents conversion gain performance, noise figure characteristics, signal isolation metrics, and third-order interception point behavior across the tested frequency ranges. Three laboratory-validated converter designs demonstrate that compact, fully integrated photonic frequency converters can meet the stringent performance requirements of next-generation satellite systems while delivering substantial reductions in mass and physical volume compared to conventional RF-based conversion approaches.