The Component Theory of Calculating Radio Spectra with Special Reference to Frequency Modulation

A new theory for the resolution of a modulated signal into its radio-frequency spectrum is presented. It is shown that this theory is mathematically equivalent to previous methods of analysis. The component theory introduces physical concepts which give an understanding of the process of formation of sidebands. Examples are worked using an analytical method of analysis. The theory also naturally leads to a graphical method which is applicable without harmonic analysis of the modulation. The concepts apply without modification to any type of modulation although special emphasis is given to frequency modulation.