Idealized Operation of Class E Frequency Multipliers

TLDR: In this paper, a new analysis of idealized class E frequency multipliers similar to that used by Raab in his description of class E amplifiers, in that the equations describing multiplier operation are obtained from Fourier series methods and the assumption of an infinite output network Q, are used to determine 1) optimum operation (maximum power output capability at 100-percent efficiency) at any harmonic, and 2) design equations that yield the requisite component values for optimum operation.

Abstract: The theoretical performance of class E frequency multipliers described by Kozyrev bears little resemblance to the observed performance of such circuits. This paper provides a new analysis of idealized class E frequency multipliers similar to that used by Raab in his description of class E amplifiers, in that the equations describing multiplier operation are obtained from Fourier series methods and the assumption of an infinite output network Q . The equations so obtained are used to determine 1) optimum operation (maximum power output capability at 100-percent efficiency) at any harmonic, and 2) design equations that yield the requisite component values for optimum operation. The equations provide an easily used design method for optimum class E multipliers but allow the implementation of nonoptimum multipliers to suit any design objective. Class E multipliers with moderate values of output network Q were constructed and tested. The measured performance of these experimental circuits shows excellent agreement to the theoretical performance predicted by the equations.