The Measurement of Harmonic Power Output of a Radio Transmitter

A method of determining the harmonic power output of a high-frequency radio transmitter is described. It is a method for measuring the power delivered by the transmitter to the antenna system, as distinguished from the more common method of measuring harmonic field strengths at specified locations. It is essentially a comparison method. The unknown harmonic power, present with the fundamental, is compared by means of a sufficiently selective receiving set with a known comparison power which is supplied in the absence of the fundamental. The method in practice seems to be accurate within about one decibel. It is applicable to the measurement of power other than harmonic power.