This report deals with the ElectroMagnetic Compatibility (EMC) evaluation of the proposed SPS Reference Design. The consideration was required to indicate the character of functional and environmental effects for alternate power beam frequency ranges as one input to future trade-off investigations. The basic conclusions from this task show that frequencies below the proposed 2.45GHz are not recommended because of increased compatibility problems with a large number of existing systems and larger Spacetenna and Rectenna areas. Higher frequencies have increased troposphere interactions which would significantly reduce system efficiency during storm conditions. Trade-offs and further studies for frequencies greater than 2.45GHz are presented.