Spacecraft Hull Effect on Radiated Emissions and Optimal Onboard Payload Allocation

Abstract

Understanding the Electromagnetic behavior and studying Electromagnetic Compatibility issues are essential to ensure the proper functionality of the electrical equipment and electronic parts within a spacecraft. As an example, and in the case of implementing a scientific experiment, severe consequences could occur if other payload systems (e.g. telemetry or telecommunications links) are disturbed or even disrupted. For this reason, a detailed study regarding the proper placement of the spacecraft equipment, i.e. the sources of electromagnetic interference, is imperative. Authors in this work are presenting an improved methodology aiming to eliminate the electric radiated emissions at a pre-selected region inside the space platform where sensitive payload or scientific instruments are located. Moreover, the effect of a conductive cavity on the overall electromagnetic field distribution is studied. This methodology uses a heuristic approach for optimal onboard payload allocation taking into consideration the hull’s conductive surfaces.