1922/02/01 by John R. Carson · 5 citations
Engineering · #Antenna Design and Optimization #Advanced Control and Stabilization in Aerospace Systems
paper · doi:10.1109/jrproc.1922.219793
openalex publication_date 1922/02/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/15
The transmission system of "frequency modulation" (transmission by variation of the frequency of the radiated wave) is mathematically analyzed, and the width of the band of frequencies occupied by this method of transmission at a given speed is compared with the width of the corresponding band for transmission by amplitude variation. It is proved that the frequency modulation system using a spacing or compensating wave is inferior to the amplitude variation system both as to the width of the frequency band occupied and as to distortion of signal wave form.