Experimental Investigation on Class-E and Class-F^-1 Operation under Square-Waveform Excitation

In this paper we experimentally analyze two of the most controversial classes of operation, i.e., class E and class F-1, often misinterpreted, due to the necessity of an exciting waveform different from a pure sinusoidal or distorted sinusoidal signal. As a matter of fact, without a proper shaping of the input signal these classes of operation give rise to very poor amplifier performance that can lead to erroneous conclusions.