A Simple Method of Harmonic Analysis for Use in Radio Engineering Practice

A simple method of harmonic analysis is applied for a-c waves with certain properties. Curves having such properties often occur in audio-and radio-frequency applications in the form of so-called "characteristics." This paper presents a graphical method of finding the amplitudes of the harmonics by working directly from the "characteristic." For obtaining the results, a polar planimeter is used. The design of a new mechanical harmonic analyzer is based on this method. In general, this method is a special case of a method of harmonic analysis formerly found by English and German authors.