Complex sentence: The American delegation specifically proposed several bands, including the now commonplace 2.4GHz band, to accommodate the then nascent process of microwave heating; however, FCC annual reports of that time suggest that much preparation was done ahead of these presentations.
Split into simpler sentences: The American delegation specifically proposed several bands, including the now commonplace 2.4GHz band, to accommodate the then nascent process of microwave heating. However, FCC annual reports of that time suggest that much preparation was done ahead of these presentations.